diff --git a/Libraries/LibWeb/CSS/Interpolation.cpp b/Libraries/LibWeb/CSS/Interpolation.cpp
index 42ee4c02f34..f5d7fd76be1 100644
--- a/Libraries/LibWeb/CSS/Interpolation.cpp
+++ b/Libraries/LibWeb/CSS/Interpolation.cpp
@@ -8,6 +8,7 @@
  */
 
 #include "Interpolation.h"
+#include <AK/IntegralMath.h>
 #include <LibWeb/CSS/PropertyID.h>
 #include <LibWeb/CSS/StyleComputer.h>
 #include <LibWeb/CSS/StyleValues/AngleStyleValue.h>
@@ -72,6 +73,8 @@ ValueComparingRefPtr<CSSStyleValue const> interpolate_property(DOM::Element& ele
         return interpolate_value(element, calculation_context, from, to, delta);
     case AnimationType::None:
         return to;
+    case AnimationType::RepeatableList:
+        return interpolate_repeatable_list(element, calculation_context, from, to, delta);
     case AnimationType::Custom: {
         if (property_id == PropertyID::Transform) {
             if (auto interpolated_transform = interpolate_transform(element, from, to, delta))
@@ -89,8 +92,6 @@ ValueComparingRefPtr<CSSStyleValue const> interpolate_property(DOM::Element& ele
         // FIXME: Handle all custom animatable properties
         [[fallthrough]];
     }
-    // FIXME: Handle repeatable-list animatable properties
-    case AnimationType::RepeatableList:
     case AnimationType::Discrete:
     default:
         return delta >= 0.5f ? to : from;
@@ -500,7 +501,12 @@ NonnullRefPtr<CSSStyleValue const> interpolate_box_shadow(DOM::Element& element,
     return StyleValueList::create(move(result_shadows), StyleValueList::Separator::Comma);
 }
 
-NonnullRefPtr<CSSStyleValue const> interpolate_value(DOM::Element& element, CalculationContext const& calculation_context, CSSStyleValue const& from, CSSStyleValue const& to, float delta)
+enum class AllowDiscrete {
+    Yes,
+    No,
+};
+
+static RefPtr<CSSStyleValue const> interpolate_value_impl(DOM::Element& element, CalculationContext const& calculation_context, CSSStyleValue const& from, CSSStyleValue const& to, float delta, AllowDiscrete allow_discrete)
 {
     if (from.type() != to.type()) {
         // Handle mixed percentage and dimension types
@@ -685,8 +691,60 @@ NonnullRefPtr<CSSStyleValue const> interpolate_value(DOM::Element& element, Calc
         return StyleValueList::create(move(interpolated_values), from_list.separator());
     }
     default:
+        if (allow_discrete == AllowDiscrete::No)
+            return {};
         return delta >= 0.5f ? to : from;
     }
 }
 
+NonnullRefPtr<CSSStyleValue const> interpolate_value(DOM::Element& element, CalculationContext const& calculation_context, CSSStyleValue const& from, CSSStyleValue const& to, float delta)
+{
+    return *interpolate_value_impl(element, calculation_context, from, to, delta, AllowDiscrete::Yes);
+}
+
+NonnullRefPtr<CSSStyleValue const> interpolate_repeatable_list(DOM::Element& element, CalculationContext const& calculation_context, CSSStyleValue const& from, CSSStyleValue const& to, float delta)
+{
+    // https://www.w3.org/TR/web-animations/#repeatable-list
+    // Same as by computed value except that if the two lists have differing numbers of items, they are first repeated to the least common multiple number of items.
+    // Each item is then combined by computed value.
+    // If a pair of values cannot be combined or if any component value uses discrete animation, then the property values combine as discrete.
+
+    auto make_repeatable_list = [&](auto const& from_list, auto const& to_list, Function<void(NonnullRefPtr<CSSStyleValue const>)> append_callback) -> bool {
+        // If the number of components or the types of corresponding components do not match,
+        // or if any component value uses discrete animation and the two corresponding values do not match,
+        // then the property values combine as discrete
+        auto list_size = AK::lcm(from_list.size(), to_list.size());
+        for (size_t i = 0; i < list_size; ++i) {
+            auto value = interpolate_value_impl(element, calculation_context, from_list.value_at(i, true), to_list.value_at(i, true), delta, AllowDiscrete::No);
+            if (!value)
+                return false;
+            append_callback(*value);
+        }
+
+        return true;
+    };
+
+    auto make_single_value_list = [&](auto const& value, size_t size, auto separator) {
+        StyleValueVector values;
+        values.ensure_capacity(size);
+        for (size_t i = 0; i < size; ++i)
+            values.append(value);
+        return StyleValueList::create(move(values), separator);
+    };
+
+    NonnullRefPtr from_list = from;
+    NonnullRefPtr to_list = to;
+    if (!from.is_value_list() && to.is_value_list())
+        from_list = make_single_value_list(from, to.as_value_list().size(), to.as_value_list().separator());
+    else if (!to.is_value_list() && from.is_value_list())
+        to_list = make_single_value_list(to, from.as_value_list().size(), to.as_value_list().separator());
+    else if (!from.is_value_list() && !to.is_value_list())
+        return interpolate_value(element, calculation_context, from, to, delta);
+
+    StyleValueVector interpolated_values;
+    if (!make_repeatable_list(from_list->as_value_list(), to_list->as_value_list(), [&](auto const& value) { interpolated_values.append(value); }))
+        return delta >= 0.5f ? to : from;
+    return StyleValueList::create(move(interpolated_values), from_list->as_value_list().separator());
+}
+
 }
diff --git a/Libraries/LibWeb/CSS/Interpolation.h b/Libraries/LibWeb/CSS/Interpolation.h
index d51666c6565..d178981026f 100644
--- a/Libraries/LibWeb/CSS/Interpolation.h
+++ b/Libraries/LibWeb/CSS/Interpolation.h
@@ -19,6 +19,7 @@ ValueComparingRefPtr<CSSStyleValue const> interpolate_property(DOM::Element&, Pr
 bool property_values_are_transitionable(PropertyID, CSSStyleValue const& old_value, CSSStyleValue const& new_value);
 
 NonnullRefPtr<CSSStyleValue const> interpolate_value(DOM::Element&, CalculationContext const&, CSSStyleValue const& from, CSSStyleValue const& to, float delta);
+NonnullRefPtr<CSSStyleValue const> interpolate_repeatable_list(DOM::Element&, CalculationContext const&, CSSStyleValue const& from, CSSStyleValue const& to, float delta);
 NonnullRefPtr<CSSStyleValue const> interpolate_box_shadow(DOM::Element&, CalculationContext const&, CSSStyleValue const& from, CSSStyleValue const& to, float delta);
 RefPtr<CSSStyleValue const> interpolate_transform(DOM::Element&, CSSStyleValue const& from, CSSStyleValue const& to, float delta);
 
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-backgrounds/animations/background-position-interpolation.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-backgrounds/animations/background-position-interpolation.txt
index 427a398e90b..d61089dbe53 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/css-backgrounds/animations/background-position-interpolation.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-backgrounds/animations/background-position-interpolation.txt
@@ -2,8 +2,8 @@ Harness status: OK
 
 Found 196 tests
 
-14 Pass
-182 Fail
+40 Pass
+156 Fail
 Fail	CSS Transitions: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [30px 30px, 30px 30px, 30px 30px, 30px 30px]
 Fail	CSS Transitions: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [40px 40px, 40px 40px, 40px 40px, 40px 40px]
 Fail	CSS Transitions: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [50px 50px, 50px 50px, 50px 50px, 50px 50px]
@@ -47,14 +47,14 @@ Fail	CSS Transitions with transition: all: property <background-position> from [
 Fail	CSS Transitions with transition: all: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px)]
 Fail	CSS Transitions with transition: all: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px)]
 Fail	CSS Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px)]
-Fail	CSS Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [0% 0%, 0% 0%, 0% 0%, 0% 0%]
+Pass	CSS Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [0% 0%, 0% 0%, 0% 0%, 0% 0%]
 Fail	CSS Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px)]
 Fail	CSS Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px)]
 Fail	CSS Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px)]
 Fail	CSS Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px)]
 Fail	CSS Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px)]
 Fail	Web Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px)]
-Fail	Web Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [0% 0%, 0% 0%, 0% 0%, 0% 0%]
+Pass	Web Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [0% 0%, 0% 0%, 0% 0%, 0% 0%]
 Fail	Web Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px)]
 Fail	Web Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px)]
 Fail	Web Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px)]
@@ -74,20 +74,20 @@ Fail	CSS Transitions with transition: all: property <background-position> from [
 Fail	CSS Transitions with transition: all: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [75px 75px, 75px 75px, 75px 75px, 75px 75px]
 Pass	CSS Transitions with transition: all: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [80px 80px, 80px 80px, 80px 80px, 80px 80px]
 Fail	CSS Transitions with transition: all: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [85px 85px, 85px 85px, 85px 85px, 85px 85px]
-Fail	CSS Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [55px 55px, 55px 55px, 55px 55px, 55px 55px]
-Fail	CSS Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [60px 60px, 60px 60px, 60px 60px, 60px 60px]
-Fail	CSS Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [65px 65px, 65px 65px, 65px 65px, 65px 65px]
-Fail	CSS Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [70px 70px, 70px 70px, 70px 70px, 70px 70px]
-Fail	CSS Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [75px 75px, 75px 75px, 75px 75px, 75px 75px]
+Pass	CSS Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [55px 55px, 55px 55px, 55px 55px, 55px 55px]
+Pass	CSS Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [60px 60px, 60px 60px, 60px 60px, 60px 60px]
+Pass	CSS Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [65px 65px, 65px 65px, 65px 65px, 65px 65px]
+Pass	CSS Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [70px 70px, 70px 70px, 70px 70px, 70px 70px]
+Pass	CSS Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [75px 75px, 75px 75px, 75px 75px, 75px 75px]
 Pass	CSS Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [80px 80px, 80px 80px, 80px 80px, 80px 80px]
-Fail	CSS Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [85px 85px, 85px 85px, 85px 85px, 85px 85px]
-Fail	Web Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [55px 55px, 55px 55px, 55px 55px, 55px 55px]
-Fail	Web Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [60px 60px, 60px 60px, 60px 60px, 60px 60px]
-Fail	Web Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [65px 65px, 65px 65px, 65px 65px, 65px 65px]
-Fail	Web Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [70px 70px, 70px 70px, 70px 70px, 70px 70px]
-Fail	Web Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [75px 75px, 75px 75px, 75px 75px, 75px 75px]
+Pass	CSS Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [85px 85px, 85px 85px, 85px 85px, 85px 85px]
+Pass	Web Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [55px 55px, 55px 55px, 55px 55px, 55px 55px]
+Pass	Web Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [60px 60px, 60px 60px, 60px 60px, 60px 60px]
+Pass	Web Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [65px 65px, 65px 65px, 65px 65px, 65px 65px]
+Pass	Web Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [70px 70px, 70px 70px, 70px 70px, 70px 70px]
+Pass	Web Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [75px 75px, 75px 75px, 75px 75px, 75px 75px]
 Pass	Web Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [80px 80px, 80px 80px, 80px 80px, 80px 80px]
-Fail	Web Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [85px 85px, 85px 85px, 85px 85px, 85px 85px]
+Pass	Web Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [85px 85px, 85px 85px, 85px 85px, 85px 85px]
 Fail	CSS Transitions: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px)]
 Fail	CSS Transitions: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [0% 0%, 0% 0%, 0% 0%, 0% 0%]
 Fail	CSS Transitions: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px)]
@@ -103,14 +103,14 @@ Fail	CSS Transitions with transition: all: property <background-position> from [
 Fail	CSS Transitions with transition: all: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px)]
 Fail	CSS Transitions with transition: all: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px)]
 Fail	CSS Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px)]
-Fail	CSS Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [0% 0%, 0% 0%, 0% 0%, 0% 0%]
+Pass	CSS Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [0% 0%, 0% 0%, 0% 0%, 0% 0%]
 Fail	CSS Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px)]
 Fail	CSS Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px)]
 Fail	CSS Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px)]
 Fail	CSS Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px)]
 Fail	CSS Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px)]
 Fail	Web Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px)]
-Fail	Web Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [0% 0%, 0% 0%, 0% 0%, 0% 0%]
+Pass	Web Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [0% 0%, 0% 0%, 0% 0%, 0% 0%]
 Fail	Web Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px)]
 Fail	Web Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px)]
 Fail	Web Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px)]
@@ -130,20 +130,20 @@ Fail	CSS Transitions with transition: all: property <background-position> from [
 Fail	CSS Transitions with transition: all: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [ 60px  60px,  60px  60px,  60px  60px,  60px  60px]
 Pass	CSS Transitions with transition: all: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [ 80px  80px,  80px  80px,  80px  80px,  80px  80px]
 Fail	CSS Transitions with transition: all: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [100px 100px, 100px 100px, 100px 100px, 100px 100px]
-Fail	CSS Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [-20px -20px, -20px -20px, -20px -20px, -20px -20px]
+Pass	CSS Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [-20px -20px, -20px -20px, -20px -20px, -20px -20px]
 Pass	CSS Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [  0px   0px,   0px   0px,   0px   0px,   0px   0px]
-Fail	CSS Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [ 20px  20px,  20px  20px,  20px  20px,  20px  20px]
-Fail	CSS Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [ 40px  40px,  40px  40px,  40px  40px,  40px  40px]
-Fail	CSS Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [ 60px  60px,  60px  60px,  60px  60px,  60px  60px]
+Pass	CSS Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [ 20px  20px,  20px  20px,  20px  20px,  20px  20px]
+Pass	CSS Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [ 40px  40px,  40px  40px,  40px  40px,  40px  40px]
+Pass	CSS Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [ 60px  60px,  60px  60px,  60px  60px,  60px  60px]
 Pass	CSS Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [ 80px  80px,  80px  80px,  80px  80px,  80px  80px]
-Fail	CSS Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [100px 100px, 100px 100px, 100px 100px, 100px 100px]
-Fail	Web Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [-20px -20px, -20px -20px, -20px -20px, -20px -20px]
+Pass	CSS Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [100px 100px, 100px 100px, 100px 100px, 100px 100px]
+Pass	Web Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [-20px -20px, -20px -20px, -20px -20px, -20px -20px]
 Pass	Web Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [  0px   0px,   0px   0px,   0px   0px,   0px   0px]
-Fail	Web Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [ 20px  20px,  20px  20px,  20px  20px,  20px  20px]
-Fail	Web Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [ 40px  40px,  40px  40px,  40px  40px,  40px  40px]
-Fail	Web Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [ 60px  60px,  60px  60px,  60px  60px,  60px  60px]
+Pass	Web Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [ 20px  20px,  20px  20px,  20px  20px,  20px  20px]
+Pass	Web Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [ 40px  40px,  40px  40px,  40px  40px,  40px  40px]
+Pass	Web Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [ 60px  60px,  60px  60px,  60px  60px,  60px  60px]
 Pass	Web Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [ 80px  80px,  80px  80px,  80px  80px,  80px  80px]
-Fail	Web Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [100px 100px, 100px 100px, 100px 100px, 100px 100px]
+Pass	Web Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [100px 100px, 100px 100px, 100px 100px, 100px 100px]
 Fail	CSS Transitions: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (-0.25) should be [-20px -20px, -20px -20px, -20px -20px, -20px -20px]
 Fail	CSS Transitions: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (0) should be [  0px   0px,   0px   0px,   0px   0px,   0px   0px]
 Fail	CSS Transitions: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (0.25) should be [ 20px  20px,  20px  20px,  20px  20px,  20px  20px]
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-backgrounds/animations/background-position-origin-interpolation.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-backgrounds/animations/background-position-origin-interpolation.txt
index 0baf80675d3..5c2f8594513 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/css-backgrounds/animations/background-position-origin-interpolation.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-backgrounds/animations/background-position-origin-interpolation.txt
@@ -2,8 +2,8 @@ Harness status: OK
 
 Found 280 tests
 
-68 Pass
-212 Fail
+80 Pass
+200 Fail
 Fail	CSS Transitions: property <background-position> from neutral to [left 20px top 20px] at (0) should be [10px 10px]
 Fail	CSS Transitions: property <background-position> from neutral to [left 20px top 20px] at (0.25) should be [12.5px 12.5px]
 Fail	CSS Transitions: property <background-position> from neutral to [left 20px top 20px] at (0.5) should be [15px 15px]
@@ -55,14 +55,14 @@ Fail	CSS Transitions with transition: all: property <background-position> from [
 Fail	CSS Transitions with transition: all: property <background-position> from [inherit] to [left 20px top 20px] at (0.75) should be [35px 35px]
 Pass	CSS Transitions with transition: all: property <background-position> from [inherit] to [left 20px top 20px] at (1) should be [20px 20px]
 Pass	CSS Animations: property <background-position> from [inherit] to [left 20px top 20px] at (0) should be [80px 80px]
-Fail	CSS Animations: property <background-position> from [inherit] to [left 20px top 20px] at (0.25) should be [65px 65px]
-Fail	CSS Animations: property <background-position> from [inherit] to [left 20px top 20px] at (0.5) should be [50px 50px]
-Fail	CSS Animations: property <background-position> from [inherit] to [left 20px top 20px] at (0.75) should be [35px 35px]
+Pass	CSS Animations: property <background-position> from [inherit] to [left 20px top 20px] at (0.25) should be [65px 65px]
+Pass	CSS Animations: property <background-position> from [inherit] to [left 20px top 20px] at (0.5) should be [50px 50px]
+Pass	CSS Animations: property <background-position> from [inherit] to [left 20px top 20px] at (0.75) should be [35px 35px]
 Pass	CSS Animations: property <background-position> from [inherit] to [left 20px top 20px] at (1) should be [20px 20px]
 Pass	Web Animations: property <background-position> from [inherit] to [left 20px top 20px] at (0) should be [80px 80px]
-Fail	Web Animations: property <background-position> from [inherit] to [left 20px top 20px] at (0.25) should be [65px 65px]
-Fail	Web Animations: property <background-position> from [inherit] to [left 20px top 20px] at (0.5) should be [50px 50px]
-Fail	Web Animations: property <background-position> from [inherit] to [left 20px top 20px] at (0.75) should be [35px 35px]
+Pass	Web Animations: property <background-position> from [inherit] to [left 20px top 20px] at (0.25) should be [65px 65px]
+Pass	Web Animations: property <background-position> from [inherit] to [left 20px top 20px] at (0.5) should be [50px 50px]
+Pass	Web Animations: property <background-position> from [inherit] to [left 20px top 20px] at (0.75) should be [35px 35px]
 Pass	Web Animations: property <background-position> from [inherit] to [left 20px top 20px] at (1) should be [20px 20px]
 Fail	CSS Transitions: property <background-position> from [unset] to [left 20px top 20px] at (0) should be [0% 0%]
 Fail	CSS Transitions: property <background-position> from [unset] to [left 20px top 20px] at (0.25) should be [calc(0% + 5px) calc(0% + 5px)]
@@ -275,12 +275,12 @@ Fail	CSS Transitions with transition: all: property <background-position> from [
 Fail	CSS Transitions with transition: all: property <background-position> from [center] to [bottom] at (0.75) should be [50% 87.5%]
 Pass	CSS Transitions with transition: all: property <background-position> from [center] to [bottom] at (1) should be [50% 100%]
 Pass	CSS Animations: property <background-position> from [center] to [bottom] at (0) should be [50% 50%]
-Fail	CSS Animations: property <background-position> from [center] to [bottom] at (0.25) should be [50% 62.5%]
-Fail	CSS Animations: property <background-position> from [center] to [bottom] at (0.5) should be [50% 75%]
-Fail	CSS Animations: property <background-position> from [center] to [bottom] at (0.75) should be [50% 87.5%]
+Pass	CSS Animations: property <background-position> from [center] to [bottom] at (0.25) should be [50% 62.5%]
+Pass	CSS Animations: property <background-position> from [center] to [bottom] at (0.5) should be [50% 75%]
+Pass	CSS Animations: property <background-position> from [center] to [bottom] at (0.75) should be [50% 87.5%]
 Pass	CSS Animations: property <background-position> from [center] to [bottom] at (1) should be [50% 100%]
 Pass	Web Animations: property <background-position> from [center] to [bottom] at (0) should be [50% 50%]
-Fail	Web Animations: property <background-position> from [center] to [bottom] at (0.25) should be [50% 62.5%]
-Fail	Web Animations: property <background-position> from [center] to [bottom] at (0.5) should be [50% 75%]
-Fail	Web Animations: property <background-position> from [center] to [bottom] at (0.75) should be [50% 87.5%]
+Pass	Web Animations: property <background-position> from [center] to [bottom] at (0.25) should be [50% 62.5%]
+Pass	Web Animations: property <background-position> from [center] to [bottom] at (0.5) should be [50% 75%]
+Pass	Web Animations: property <background-position> from [center] to [bottom] at (0.75) should be [50% 87.5%]
 Pass	Web Animations: property <background-position> from [center] to [bottom] at (1) should be [50% 100%]
\ No newline at end of file
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-backgrounds/animations/background-position-x-interpolation.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-backgrounds/animations/background-position-x-interpolation.txt
index 0c8f38f3e5b..10461e21208 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/css-backgrounds/animations/background-position-x-interpolation.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-backgrounds/animations/background-position-x-interpolation.txt
@@ -2,8 +2,8 @@ Harness status: OK
 
 Found 112 tests
 
-16 Pass
-96 Fail
+50 Pass
+62 Fail
 Fail	CSS Transitions: property <background-position-x> from neutral to [80px] at (-0.25) should be [30px]
 Fail	CSS Transitions: property <background-position-x> from neutral to [80px] at (0) should be [40px]
 Fail	CSS Transitions: property <background-position-x> from neutral to [80px] at (0.25) should be [50px]
@@ -46,20 +46,20 @@ Fail	CSS Transitions with transition: all: property <background-position-x> from
 Fail	CSS Transitions with transition: all: property <background-position-x> from [initial] to [right] at (0.75) should be [75%]
 Pass	CSS Transitions with transition: all: property <background-position-x> from [initial] to [right] at (1) should be [100%]
 Fail	CSS Transitions with transition: all: property <background-position-x> from [initial] to [right] at (1.25) should be [125%]
-Fail	CSS Animations: property <background-position-x> from [initial] to [right] at (-0.25) should be [-25%]
+Pass	CSS Animations: property <background-position-x> from [initial] to [right] at (-0.25) should be [-25%]
 Pass	CSS Animations: property <background-position-x> from [initial] to [right] at (0) should be [0%]
-Fail	CSS Animations: property <background-position-x> from [initial] to [right] at (0.25) should be [25%]
-Fail	CSS Animations: property <background-position-x> from [initial] to [right] at (0.5) should be [50%]
-Fail	CSS Animations: property <background-position-x> from [initial] to [right] at (0.75) should be [75%]
+Pass	CSS Animations: property <background-position-x> from [initial] to [right] at (0.25) should be [25%]
+Pass	CSS Animations: property <background-position-x> from [initial] to [right] at (0.5) should be [50%]
+Pass	CSS Animations: property <background-position-x> from [initial] to [right] at (0.75) should be [75%]
 Pass	CSS Animations: property <background-position-x> from [initial] to [right] at (1) should be [100%]
-Fail	CSS Animations: property <background-position-x> from [initial] to [right] at (1.25) should be [125%]
-Fail	Web Animations: property <background-position-x> from [initial] to [right] at (-0.25) should be [-25%]
+Pass	CSS Animations: property <background-position-x> from [initial] to [right] at (1.25) should be [125%]
+Pass	Web Animations: property <background-position-x> from [initial] to [right] at (-0.25) should be [-25%]
 Pass	Web Animations: property <background-position-x> from [initial] to [right] at (0) should be [0%]
-Fail	Web Animations: property <background-position-x> from [initial] to [right] at (0.25) should be [25%]
-Fail	Web Animations: property <background-position-x> from [initial] to [right] at (0.5) should be [50%]
-Fail	Web Animations: property <background-position-x> from [initial] to [right] at (0.75) should be [75%]
+Pass	Web Animations: property <background-position-x> from [initial] to [right] at (0.25) should be [25%]
+Pass	Web Animations: property <background-position-x> from [initial] to [right] at (0.5) should be [50%]
+Pass	Web Animations: property <background-position-x> from [initial] to [right] at (0.75) should be [75%]
 Pass	Web Animations: property <background-position-x> from [initial] to [right] at (1) should be [100%]
-Fail	Web Animations: property <background-position-x> from [initial] to [right] at (1.25) should be [125%]
+Pass	Web Animations: property <background-position-x> from [initial] to [right] at (1.25) should be [125%]
 Fail	CSS Transitions: property <background-position-x> from [inherit] to [80px] at (-0.25) should be [55px]
 Fail	CSS Transitions: property <background-position-x> from [inherit] to [80px] at (0) should be [60px]
 Fail	CSS Transitions: property <background-position-x> from [inherit] to [80px] at (0.25) should be [65px]
@@ -74,20 +74,20 @@ Fail	CSS Transitions with transition: all: property <background-position-x> from
 Fail	CSS Transitions with transition: all: property <background-position-x> from [inherit] to [80px] at (0.75) should be [75px]
 Pass	CSS Transitions with transition: all: property <background-position-x> from [inherit] to [80px] at (1) should be [80px]
 Fail	CSS Transitions with transition: all: property <background-position-x> from [inherit] to [80px] at (1.25) should be [85px]
-Fail	CSS Animations: property <background-position-x> from [inherit] to [80px] at (-0.25) should be [55px]
+Pass	CSS Animations: property <background-position-x> from [inherit] to [80px] at (-0.25) should be [55px]
 Pass	CSS Animations: property <background-position-x> from [inherit] to [80px] at (0) should be [60px]
-Fail	CSS Animations: property <background-position-x> from [inherit] to [80px] at (0.25) should be [65px]
-Fail	CSS Animations: property <background-position-x> from [inherit] to [80px] at (0.5) should be [70px]
-Fail	CSS Animations: property <background-position-x> from [inherit] to [80px] at (0.75) should be [75px]
+Pass	CSS Animations: property <background-position-x> from [inherit] to [80px] at (0.25) should be [65px]
+Pass	CSS Animations: property <background-position-x> from [inherit] to [80px] at (0.5) should be [70px]
+Pass	CSS Animations: property <background-position-x> from [inherit] to [80px] at (0.75) should be [75px]
 Pass	CSS Animations: property <background-position-x> from [inherit] to [80px] at (1) should be [80px]
-Fail	CSS Animations: property <background-position-x> from [inherit] to [80px] at (1.25) should be [85px]
-Fail	Web Animations: property <background-position-x> from [inherit] to [80px] at (-0.25) should be [55px]
+Pass	CSS Animations: property <background-position-x> from [inherit] to [80px] at (1.25) should be [85px]
+Pass	Web Animations: property <background-position-x> from [inherit] to [80px] at (-0.25) should be [55px]
 Pass	Web Animations: property <background-position-x> from [inherit] to [80px] at (0) should be [60px]
-Fail	Web Animations: property <background-position-x> from [inherit] to [80px] at (0.25) should be [65px]
-Fail	Web Animations: property <background-position-x> from [inherit] to [80px] at (0.5) should be [70px]
-Fail	Web Animations: property <background-position-x> from [inherit] to [80px] at (0.75) should be [75px]
+Pass	Web Animations: property <background-position-x> from [inherit] to [80px] at (0.25) should be [65px]
+Pass	Web Animations: property <background-position-x> from [inherit] to [80px] at (0.5) should be [70px]
+Pass	Web Animations: property <background-position-x> from [inherit] to [80px] at (0.75) should be [75px]
 Pass	Web Animations: property <background-position-x> from [inherit] to [80px] at (1) should be [80px]
-Fail	Web Animations: property <background-position-x> from [inherit] to [80px] at (1.25) should be [85px]
+Pass	Web Animations: property <background-position-x> from [inherit] to [80px] at (1.25) should be [85px]
 Fail	CSS Transitions: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (-0.25) should be [250px, 350px, 200px, 375px, 225px, 325px]
 Fail	CSS Transitions: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (0) should be [300px, 400px, 300px, 400px, 300px, 400px]
 Fail	CSS Transitions: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (0.25) should be [350px, 450px, 400px, 425px, 375px, 475px]
@@ -102,17 +102,17 @@ Fail	CSS Transitions with transition: all: property <background-position-x> from
 Fail	CSS Transitions with transition: all: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (0.75) should be [450px, 550px, 600px, 475px, 525px, 625px]
 Fail	CSS Transitions with transition: all: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (1) should be [500px, 600px, 700px, 500px, 600px, 700px]
 Fail	CSS Transitions with transition: all: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (1.25) should be [550px, 650px, 800px, 525px, 675px, 775px]
-Fail	CSS Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (-0.25) should be [250px, 350px, 200px, 375px, 225px, 325px]
-Fail	CSS Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (0) should be [300px, 400px, 300px, 400px, 300px, 400px]
-Fail	CSS Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (0.25) should be [350px, 450px, 400px, 425px, 375px, 475px]
-Fail	CSS Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (0.5) should be [400px, 500px, 500px, 450px, 450px, 550px]
-Fail	CSS Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (0.75) should be [450px, 550px, 600px, 475px, 525px, 625px]
-Fail	CSS Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (1) should be [500px, 600px, 700px, 500px, 600px, 700px]
-Fail	CSS Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (1.25) should be [550px, 650px, 800px, 525px, 675px, 775px]
-Fail	Web Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (-0.25) should be [250px, 350px, 200px, 375px, 225px, 325px]
-Fail	Web Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (0) should be [300px, 400px, 300px, 400px, 300px, 400px]
-Fail	Web Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (0.25) should be [350px, 450px, 400px, 425px, 375px, 475px]
-Fail	Web Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (0.5) should be [400px, 500px, 500px, 450px, 450px, 550px]
-Fail	Web Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (0.75) should be [450px, 550px, 600px, 475px, 525px, 625px]
-Fail	Web Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (1) should be [500px, 600px, 700px, 500px, 600px, 700px]
-Fail	Web Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (1.25) should be [550px, 650px, 800px, 525px, 675px, 775px]
\ No newline at end of file
+Pass	CSS Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (-0.25) should be [250px, 350px, 200px, 375px, 225px, 325px]
+Pass	CSS Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (0) should be [300px, 400px, 300px, 400px, 300px, 400px]
+Pass	CSS Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (0.25) should be [350px, 450px, 400px, 425px, 375px, 475px]
+Pass	CSS Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (0.5) should be [400px, 500px, 500px, 450px, 450px, 550px]
+Pass	CSS Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (0.75) should be [450px, 550px, 600px, 475px, 525px, 625px]
+Pass	CSS Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (1) should be [500px, 600px, 700px, 500px, 600px, 700px]
+Pass	CSS Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (1.25) should be [550px, 650px, 800px, 525px, 675px, 775px]
+Pass	Web Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (-0.25) should be [250px, 350px, 200px, 375px, 225px, 325px]
+Pass	Web Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (0) should be [300px, 400px, 300px, 400px, 300px, 400px]
+Pass	Web Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (0.25) should be [350px, 450px, 400px, 425px, 375px, 475px]
+Pass	Web Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (0.5) should be [400px, 500px, 500px, 450px, 450px, 550px]
+Pass	Web Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (0.75) should be [450px, 550px, 600px, 475px, 525px, 625px]
+Pass	Web Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (1) should be [500px, 600px, 700px, 500px, 600px, 700px]
+Pass	Web Animations: property <background-position-x> from [300px, 400px] to [500px, 600px, 700px] at (1.25) should be [550px, 650px, 800px, 525px, 675px, 775px]
\ No newline at end of file
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-backgrounds/animations/background-position-y-interpolation.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-backgrounds/animations/background-position-y-interpolation.txt
index 15c1002daf8..49c24521d8a 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/css-backgrounds/animations/background-position-y-interpolation.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-backgrounds/animations/background-position-y-interpolation.txt
@@ -2,8 +2,8 @@ Harness status: OK
 
 Found 112 tests
 
-16 Pass
-96 Fail
+50 Pass
+62 Fail
 Fail	CSS Transitions: property <background-position-y> from neutral to [80px] at (-0.25) should be [30px]
 Fail	CSS Transitions: property <background-position-y> from neutral to [80px] at (0) should be [40px]
 Fail	CSS Transitions: property <background-position-y> from neutral to [80px] at (0.25) should be [50px]
@@ -46,20 +46,20 @@ Fail	CSS Transitions with transition: all: property <background-position-y> from
 Fail	CSS Transitions with transition: all: property <background-position-y> from [initial] to [bottom] at (0.75) should be [75%]
 Pass	CSS Transitions with transition: all: property <background-position-y> from [initial] to [bottom] at (1) should be [100%]
 Fail	CSS Transitions with transition: all: property <background-position-y> from [initial] to [bottom] at (1.25) should be [125%]
-Fail	CSS Animations: property <background-position-y> from [initial] to [bottom] at (-0.25) should be [-25%]
+Pass	CSS Animations: property <background-position-y> from [initial] to [bottom] at (-0.25) should be [-25%]
 Pass	CSS Animations: property <background-position-y> from [initial] to [bottom] at (0) should be [0%]
-Fail	CSS Animations: property <background-position-y> from [initial] to [bottom] at (0.25) should be [25%]
-Fail	CSS Animations: property <background-position-y> from [initial] to [bottom] at (0.5) should be [50%]
-Fail	CSS Animations: property <background-position-y> from [initial] to [bottom] at (0.75) should be [75%]
+Pass	CSS Animations: property <background-position-y> from [initial] to [bottom] at (0.25) should be [25%]
+Pass	CSS Animations: property <background-position-y> from [initial] to [bottom] at (0.5) should be [50%]
+Pass	CSS Animations: property <background-position-y> from [initial] to [bottom] at (0.75) should be [75%]
 Pass	CSS Animations: property <background-position-y> from [initial] to [bottom] at (1) should be [100%]
-Fail	CSS Animations: property <background-position-y> from [initial] to [bottom] at (1.25) should be [125%]
-Fail	Web Animations: property <background-position-y> from [initial] to [bottom] at (-0.25) should be [-25%]
+Pass	CSS Animations: property <background-position-y> from [initial] to [bottom] at (1.25) should be [125%]
+Pass	Web Animations: property <background-position-y> from [initial] to [bottom] at (-0.25) should be [-25%]
 Pass	Web Animations: property <background-position-y> from [initial] to [bottom] at (0) should be [0%]
-Fail	Web Animations: property <background-position-y> from [initial] to [bottom] at (0.25) should be [25%]
-Fail	Web Animations: property <background-position-y> from [initial] to [bottom] at (0.5) should be [50%]
-Fail	Web Animations: property <background-position-y> from [initial] to [bottom] at (0.75) should be [75%]
+Pass	Web Animations: property <background-position-y> from [initial] to [bottom] at (0.25) should be [25%]
+Pass	Web Animations: property <background-position-y> from [initial] to [bottom] at (0.5) should be [50%]
+Pass	Web Animations: property <background-position-y> from [initial] to [bottom] at (0.75) should be [75%]
 Pass	Web Animations: property <background-position-y> from [initial] to [bottom] at (1) should be [100%]
-Fail	Web Animations: property <background-position-y> from [initial] to [bottom] at (1.25) should be [125%]
+Pass	Web Animations: property <background-position-y> from [initial] to [bottom] at (1.25) should be [125%]
 Fail	CSS Transitions: property <background-position-y> from [inherit] to [80px] at (-0.25) should be [55px]
 Fail	CSS Transitions: property <background-position-y> from [inherit] to [80px] at (0) should be [60px]
 Fail	CSS Transitions: property <background-position-y> from [inherit] to [80px] at (0.25) should be [65px]
@@ -74,20 +74,20 @@ Fail	CSS Transitions with transition: all: property <background-position-y> from
 Fail	CSS Transitions with transition: all: property <background-position-y> from [inherit] to [80px] at (0.75) should be [75px]
 Pass	CSS Transitions with transition: all: property <background-position-y> from [inherit] to [80px] at (1) should be [80px]
 Fail	CSS Transitions with transition: all: property <background-position-y> from [inherit] to [80px] at (1.25) should be [85px]
-Fail	CSS Animations: property <background-position-y> from [inherit] to [80px] at (-0.25) should be [55px]
+Pass	CSS Animations: property <background-position-y> from [inherit] to [80px] at (-0.25) should be [55px]
 Pass	CSS Animations: property <background-position-y> from [inherit] to [80px] at (0) should be [60px]
-Fail	CSS Animations: property <background-position-y> from [inherit] to [80px] at (0.25) should be [65px]
-Fail	CSS Animations: property <background-position-y> from [inherit] to [80px] at (0.5) should be [70px]
-Fail	CSS Animations: property <background-position-y> from [inherit] to [80px] at (0.75) should be [75px]
+Pass	CSS Animations: property <background-position-y> from [inherit] to [80px] at (0.25) should be [65px]
+Pass	CSS Animations: property <background-position-y> from [inherit] to [80px] at (0.5) should be [70px]
+Pass	CSS Animations: property <background-position-y> from [inherit] to [80px] at (0.75) should be [75px]
 Pass	CSS Animations: property <background-position-y> from [inherit] to [80px] at (1) should be [80px]
-Fail	CSS Animations: property <background-position-y> from [inherit] to [80px] at (1.25) should be [85px]
-Fail	Web Animations: property <background-position-y> from [inherit] to [80px] at (-0.25) should be [55px]
+Pass	CSS Animations: property <background-position-y> from [inherit] to [80px] at (1.25) should be [85px]
+Pass	Web Animations: property <background-position-y> from [inherit] to [80px] at (-0.25) should be [55px]
 Pass	Web Animations: property <background-position-y> from [inherit] to [80px] at (0) should be [60px]
-Fail	Web Animations: property <background-position-y> from [inherit] to [80px] at (0.25) should be [65px]
-Fail	Web Animations: property <background-position-y> from [inherit] to [80px] at (0.5) should be [70px]
-Fail	Web Animations: property <background-position-y> from [inherit] to [80px] at (0.75) should be [75px]
+Pass	Web Animations: property <background-position-y> from [inherit] to [80px] at (0.25) should be [65px]
+Pass	Web Animations: property <background-position-y> from [inherit] to [80px] at (0.5) should be [70px]
+Pass	Web Animations: property <background-position-y> from [inherit] to [80px] at (0.75) should be [75px]
 Pass	Web Animations: property <background-position-y> from [inherit] to [80px] at (1) should be [80px]
-Fail	Web Animations: property <background-position-y> from [inherit] to [80px] at (1.25) should be [85px]
+Pass	Web Animations: property <background-position-y> from [inherit] to [80px] at (1.25) should be [85px]
 Fail	CSS Transitions: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (-0.25) should be [250px, 350px, 200px, 375px, 225px, 325px]
 Fail	CSS Transitions: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (0) should be [300px, 400px, 300px, 400px, 300px, 400px]
 Fail	CSS Transitions: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (0.25) should be [350px, 450px, 400px, 425px, 375px, 475px]
@@ -102,17 +102,17 @@ Fail	CSS Transitions with transition: all: property <background-position-y> from
 Fail	CSS Transitions with transition: all: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (0.75) should be [450px, 550px, 600px, 475px, 525px, 625px]
 Fail	CSS Transitions with transition: all: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (1) should be [500px, 600px, 700px, 500px, 600px, 700px]
 Fail	CSS Transitions with transition: all: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (1.25) should be [550px, 650px, 800px, 525px, 675px, 775px]
-Fail	CSS Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (-0.25) should be [250px, 350px, 200px, 375px, 225px, 325px]
-Fail	CSS Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (0) should be [300px, 400px, 300px, 400px, 300px, 400px]
-Fail	CSS Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (0.25) should be [350px, 450px, 400px, 425px, 375px, 475px]
-Fail	CSS Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (0.5) should be [400px, 500px, 500px, 450px, 450px, 550px]
-Fail	CSS Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (0.75) should be [450px, 550px, 600px, 475px, 525px, 625px]
-Fail	CSS Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (1) should be [500px, 600px, 700px, 500px, 600px, 700px]
-Fail	CSS Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (1.25) should be [550px, 650px, 800px, 525px, 675px, 775px]
-Fail	Web Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (-0.25) should be [250px, 350px, 200px, 375px, 225px, 325px]
-Fail	Web Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (0) should be [300px, 400px, 300px, 400px, 300px, 400px]
-Fail	Web Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (0.25) should be [350px, 450px, 400px, 425px, 375px, 475px]
-Fail	Web Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (0.5) should be [400px, 500px, 500px, 450px, 450px, 550px]
-Fail	Web Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (0.75) should be [450px, 550px, 600px, 475px, 525px, 625px]
-Fail	Web Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (1) should be [500px, 600px, 700px, 500px, 600px, 700px]
-Fail	Web Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (1.25) should be [550px, 650px, 800px, 525px, 675px, 775px]
\ No newline at end of file
+Pass	CSS Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (-0.25) should be [250px, 350px, 200px, 375px, 225px, 325px]
+Pass	CSS Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (0) should be [300px, 400px, 300px, 400px, 300px, 400px]
+Pass	CSS Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (0.25) should be [350px, 450px, 400px, 425px, 375px, 475px]
+Pass	CSS Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (0.5) should be [400px, 500px, 500px, 450px, 450px, 550px]
+Pass	CSS Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (0.75) should be [450px, 550px, 600px, 475px, 525px, 625px]
+Pass	CSS Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (1) should be [500px, 600px, 700px, 500px, 600px, 700px]
+Pass	CSS Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (1.25) should be [550px, 650px, 800px, 525px, 675px, 775px]
+Pass	Web Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (-0.25) should be [250px, 350px, 200px, 375px, 225px, 325px]
+Pass	Web Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (0) should be [300px, 400px, 300px, 400px, 300px, 400px]
+Pass	Web Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (0.25) should be [350px, 450px, 400px, 425px, 375px, 475px]
+Pass	Web Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (0.5) should be [400px, 500px, 500px, 450px, 450px, 550px]
+Pass	Web Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (0.75) should be [450px, 550px, 600px, 475px, 525px, 625px]
+Pass	Web Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (1) should be [500px, 600px, 700px, 500px, 600px, 700px]
+Pass	Web Animations: property <background-position-y> from [300px, 400px] to [500px, 600px, 700px] at (1.25) should be [550px, 650px, 800px, 525px, 675px, 775px]
\ No newline at end of file
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-images/animation/object-position-interpolation.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-images/animation/object-position-interpolation.txt
new file mode 100644
index 00000000000..2e51d84871f
--- /dev/null
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-images/animation/object-position-interpolation.txt
@@ -0,0 +1,118 @@
+Harness status: OK
+
+Found 112 tests
+
+64 Pass
+48 Fail
+Fail	CSS Transitions: property <object-position> from neutral to [left top] at (-0.25) should be [62.5% 62.5%]
+Fail	CSS Transitions: property <object-position> from neutral to [left top] at (0) should be [50% 50%]
+Fail	CSS Transitions: property <object-position> from neutral to [left top] at (0.25) should be [37.5% 37.5%]
+Fail	CSS Transitions: property <object-position> from neutral to [left top] at (0.5) should be [25% 25%]
+Fail	CSS Transitions: property <object-position> from neutral to [left top] at (0.75) should be [12.5% 12.5%]
+Pass	CSS Transitions: property <object-position> from neutral to [left top] at (1) should be [0% 0%]
+Fail	CSS Transitions: property <object-position> from neutral to [left top] at (1.25) should be [-12.5% -12.5%]
+Fail	CSS Transitions with transition: all: property <object-position> from neutral to [left top] at (-0.25) should be [62.5% 62.5%]
+Fail	CSS Transitions with transition: all: property <object-position> from neutral to [left top] at (0) should be [50% 50%]
+Fail	CSS Transitions with transition: all: property <object-position> from neutral to [left top] at (0.25) should be [37.5% 37.5%]
+Fail	CSS Transitions with transition: all: property <object-position> from neutral to [left top] at (0.5) should be [25% 25%]
+Fail	CSS Transitions with transition: all: property <object-position> from neutral to [left top] at (0.75) should be [12.5% 12.5%]
+Pass	CSS Transitions with transition: all: property <object-position> from neutral to [left top] at (1) should be [0% 0%]
+Fail	CSS Transitions with transition: all: property <object-position> from neutral to [left top] at (1.25) should be [-12.5% -12.5%]
+Pass	CSS Animations: property <object-position> from neutral to [left top] at (-0.25) should be [62.5% 62.5%]
+Pass	CSS Animations: property <object-position> from neutral to [left top] at (0) should be [50% 50%]
+Pass	CSS Animations: property <object-position> from neutral to [left top] at (0.25) should be [37.5% 37.5%]
+Pass	CSS Animations: property <object-position> from neutral to [left top] at (0.5) should be [25% 25%]
+Pass	CSS Animations: property <object-position> from neutral to [left top] at (0.75) should be [12.5% 12.5%]
+Pass	CSS Animations: property <object-position> from neutral to [left top] at (1) should be [0% 0%]
+Pass	CSS Animations: property <object-position> from neutral to [left top] at (1.25) should be [-12.5% -12.5%]
+Pass	Web Animations: property <object-position> from neutral to [left top] at (-0.25) should be [62.5% 62.5%]
+Pass	Web Animations: property <object-position> from neutral to [left top] at (0) should be [50% 50%]
+Pass	Web Animations: property <object-position> from neutral to [left top] at (0.25) should be [37.5% 37.5%]
+Pass	Web Animations: property <object-position> from neutral to [left top] at (0.5) should be [25% 25%]
+Pass	Web Animations: property <object-position> from neutral to [left top] at (0.75) should be [12.5% 12.5%]
+Pass	Web Animations: property <object-position> from neutral to [left top] at (1) should be [0% 0%]
+Pass	Web Animations: property <object-position> from neutral to [left top] at (1.25) should be [-12.5% -12.5%]
+Fail	CSS Transitions: property <object-position> from [initial] to [center top] at (-0.25) should be [50% 62.5%]
+Fail	CSS Transitions: property <object-position> from [initial] to [center top] at (0) should be [50% 50%]
+Fail	CSS Transitions: property <object-position> from [initial] to [center top] at (0.25) should be [50% 37.5%]
+Fail	CSS Transitions: property <object-position> from [initial] to [center top] at (0.5) should be [50% 25%]
+Fail	CSS Transitions: property <object-position> from [initial] to [center top] at (0.75) should be [50% 12.5%]
+Pass	CSS Transitions: property <object-position> from [initial] to [center top] at (1) should be [50% 0%]
+Fail	CSS Transitions: property <object-position> from [initial] to [center top] at (1.25) should be [50% -12.5%]
+Fail	CSS Transitions with transition: all: property <object-position> from [initial] to [center top] at (-0.25) should be [50% 62.5%]
+Fail	CSS Transitions with transition: all: property <object-position> from [initial] to [center top] at (0) should be [50% 50%]
+Fail	CSS Transitions with transition: all: property <object-position> from [initial] to [center top] at (0.25) should be [50% 37.5%]
+Fail	CSS Transitions with transition: all: property <object-position> from [initial] to [center top] at (0.5) should be [50% 25%]
+Fail	CSS Transitions with transition: all: property <object-position> from [initial] to [center top] at (0.75) should be [50% 12.5%]
+Pass	CSS Transitions with transition: all: property <object-position> from [initial] to [center top] at (1) should be [50% 0%]
+Fail	CSS Transitions with transition: all: property <object-position> from [initial] to [center top] at (1.25) should be [50% -12.5%]
+Pass	CSS Animations: property <object-position> from [initial] to [center top] at (-0.25) should be [50% 62.5%]
+Pass	CSS Animations: property <object-position> from [initial] to [center top] at (0) should be [50% 50%]
+Pass	CSS Animations: property <object-position> from [initial] to [center top] at (0.25) should be [50% 37.5%]
+Pass	CSS Animations: property <object-position> from [initial] to [center top] at (0.5) should be [50% 25%]
+Pass	CSS Animations: property <object-position> from [initial] to [center top] at (0.75) should be [50% 12.5%]
+Pass	CSS Animations: property <object-position> from [initial] to [center top] at (1) should be [50% 0%]
+Pass	CSS Animations: property <object-position> from [initial] to [center top] at (1.25) should be [50% -12.5%]
+Pass	Web Animations: property <object-position> from [initial] to [center top] at (-0.25) should be [50% 62.5%]
+Pass	Web Animations: property <object-position> from [initial] to [center top] at (0) should be [50% 50%]
+Pass	Web Animations: property <object-position> from [initial] to [center top] at (0.25) should be [50% 37.5%]
+Pass	Web Animations: property <object-position> from [initial] to [center top] at (0.5) should be [50% 25%]
+Pass	Web Animations: property <object-position> from [initial] to [center top] at (0.75) should be [50% 12.5%]
+Pass	Web Animations: property <object-position> from [initial] to [center top] at (1) should be [50% 0%]
+Pass	Web Animations: property <object-position> from [initial] to [center top] at (1.25) should be [50% -12.5%]
+Fail	CSS Transitions: property <object-position> from [initial] to [left center] at (-0.25) should be [62.5% 50%]
+Fail	CSS Transitions: property <object-position> from [initial] to [left center] at (0) should be [50% 50%]
+Fail	CSS Transitions: property <object-position> from [initial] to [left center] at (0.25) should be [37.5% 50%]
+Fail	CSS Transitions: property <object-position> from [initial] to [left center] at (0.5) should be [25% 50%]
+Fail	CSS Transitions: property <object-position> from [initial] to [left center] at (0.75) should be [12.5% 50%]
+Pass	CSS Transitions: property <object-position> from [initial] to [left center] at (1) should be [0% 50%]
+Fail	CSS Transitions: property <object-position> from [initial] to [left center] at (1.25) should be [-12.5% 50%]
+Fail	CSS Transitions with transition: all: property <object-position> from [initial] to [left center] at (-0.25) should be [62.5% 50%]
+Fail	CSS Transitions with transition: all: property <object-position> from [initial] to [left center] at (0) should be [50% 50%]
+Fail	CSS Transitions with transition: all: property <object-position> from [initial] to [left center] at (0.25) should be [37.5% 50%]
+Fail	CSS Transitions with transition: all: property <object-position> from [initial] to [left center] at (0.5) should be [25% 50%]
+Fail	CSS Transitions with transition: all: property <object-position> from [initial] to [left center] at (0.75) should be [12.5% 50%]
+Pass	CSS Transitions with transition: all: property <object-position> from [initial] to [left center] at (1) should be [0% 50%]
+Fail	CSS Transitions with transition: all: property <object-position> from [initial] to [left center] at (1.25) should be [-12.5% 50%]
+Pass	CSS Animations: property <object-position> from [initial] to [left center] at (-0.25) should be [62.5% 50%]
+Pass	CSS Animations: property <object-position> from [initial] to [left center] at (0) should be [50% 50%]
+Pass	CSS Animations: property <object-position> from [initial] to [left center] at (0.25) should be [37.5% 50%]
+Pass	CSS Animations: property <object-position> from [initial] to [left center] at (0.5) should be [25% 50%]
+Pass	CSS Animations: property <object-position> from [initial] to [left center] at (0.75) should be [12.5% 50%]
+Pass	CSS Animations: property <object-position> from [initial] to [left center] at (1) should be [0% 50%]
+Pass	CSS Animations: property <object-position> from [initial] to [left center] at (1.25) should be [-12.5% 50%]
+Pass	Web Animations: property <object-position> from [initial] to [left center] at (-0.25) should be [62.5% 50%]
+Pass	Web Animations: property <object-position> from [initial] to [left center] at (0) should be [50% 50%]
+Pass	Web Animations: property <object-position> from [initial] to [left center] at (0.25) should be [37.5% 50%]
+Pass	Web Animations: property <object-position> from [initial] to [left center] at (0.5) should be [25% 50%]
+Pass	Web Animations: property <object-position> from [initial] to [left center] at (0.75) should be [12.5% 50%]
+Pass	Web Animations: property <object-position> from [initial] to [left center] at (1) should be [0% 50%]
+Pass	Web Animations: property <object-position> from [initial] to [left center] at (1.25) should be [-12.5% 50%]
+Fail	CSS Transitions: property <object-position> from [20px 20px] to [100px 100px] at (-0.25) should be [0px 0px]
+Fail	CSS Transitions: property <object-position> from [20px 20px] to [100px 100px] at (0) should be [20px 20px]
+Fail	CSS Transitions: property <object-position> from [20px 20px] to [100px 100px] at (0.25) should be [40px 40px]
+Fail	CSS Transitions: property <object-position> from [20px 20px] to [100px 100px] at (0.5) should be [60px 60px]
+Fail	CSS Transitions: property <object-position> from [20px 20px] to [100px 100px] at (0.75) should be [80px 80px]
+Pass	CSS Transitions: property <object-position> from [20px 20px] to [100px 100px] at (1) should be [100px 100px]
+Fail	CSS Transitions: property <object-position> from [20px 20px] to [100px 100px] at (1.25) should be [120px 120px]
+Fail	CSS Transitions with transition: all: property <object-position> from [20px 20px] to [100px 100px] at (-0.25) should be [0px 0px]
+Fail	CSS Transitions with transition: all: property <object-position> from [20px 20px] to [100px 100px] at (0) should be [20px 20px]
+Fail	CSS Transitions with transition: all: property <object-position> from [20px 20px] to [100px 100px] at (0.25) should be [40px 40px]
+Fail	CSS Transitions with transition: all: property <object-position> from [20px 20px] to [100px 100px] at (0.5) should be [60px 60px]
+Fail	CSS Transitions with transition: all: property <object-position> from [20px 20px] to [100px 100px] at (0.75) should be [80px 80px]
+Pass	CSS Transitions with transition: all: property <object-position> from [20px 20px] to [100px 100px] at (1) should be [100px 100px]
+Fail	CSS Transitions with transition: all: property <object-position> from [20px 20px] to [100px 100px] at (1.25) should be [120px 120px]
+Pass	CSS Animations: property <object-position> from [20px 20px] to [100px 100px] at (-0.25) should be [0px 0px]
+Pass	CSS Animations: property <object-position> from [20px 20px] to [100px 100px] at (0) should be [20px 20px]
+Pass	CSS Animations: property <object-position> from [20px 20px] to [100px 100px] at (0.25) should be [40px 40px]
+Pass	CSS Animations: property <object-position> from [20px 20px] to [100px 100px] at (0.5) should be [60px 60px]
+Pass	CSS Animations: property <object-position> from [20px 20px] to [100px 100px] at (0.75) should be [80px 80px]
+Pass	CSS Animations: property <object-position> from [20px 20px] to [100px 100px] at (1) should be [100px 100px]
+Pass	CSS Animations: property <object-position> from [20px 20px] to [100px 100px] at (1.25) should be [120px 120px]
+Pass	Web Animations: property <object-position> from [20px 20px] to [100px 100px] at (-0.25) should be [0px 0px]
+Pass	Web Animations: property <object-position> from [20px 20px] to [100px 100px] at (0) should be [20px 20px]
+Pass	Web Animations: property <object-position> from [20px 20px] to [100px 100px] at (0.25) should be [40px 40px]
+Pass	Web Animations: property <object-position> from [20px 20px] to [100px 100px] at (0.5) should be [60px 60px]
+Pass	Web Animations: property <object-position> from [20px 20px] to [100px 100px] at (0.75) should be [80px 80px]
+Pass	Web Animations: property <object-position> from [20px 20px] to [100px 100px] at (1) should be [100px 100px]
+Pass	Web Animations: property <object-position> from [20px 20px] to [100px 100px] at (1.25) should be [120px 120px]
\ No newline at end of file
diff --git a/Tests/LibWeb/Text/input/wpt-import/css/css-images/animation/object-position-interpolation.html b/Tests/LibWeb/Text/input/wpt-import/css/css-images/animation/object-position-interpolation.html
new file mode 100644
index 00000000000..3a806706566
--- /dev/null
+++ b/Tests/LibWeb/Text/input/wpt-import/css/css-images/animation/object-position-interpolation.html
@@ -0,0 +1,72 @@
+<!DOCTYPE html>
+<meta charset="UTF-8">
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#the-object-position">
+<meta name="test" content="object-position supports animation">
+
+<script src="../../../resources/testharness.js"></script>
+<script src="../../../resources/testharnessreport.js"></script>
+<script src="../../../css/support/interpolation-testcommon.js"></script>
+
+<body></body>
+
+<script>
+  // Default object-position value is 50% 50%
+  test_interpolation({
+    property: 'object-position',
+    from: neutralKeyframe,
+    to: 'left top',
+  }, [
+    { at: -0.25, expect: '62.5% 62.5%' },
+    { at: 0, expect: '50% 50%' },
+    { at: 0.25, expect: '37.5% 37.5%' },
+    { at: 0.5, expect: '25% 25%' },
+    { at: 0.75, expect: '12.5% 12.5%' },
+    { at: 1, expect: '0% 0%' },
+    { at: 1.25, expect: '-12.5% -12.5%' },
+  ]);
+
+  // Animate x axis
+  test_interpolation({
+    property: 'object-position',
+    from: 'initial',
+    to: 'center top',
+  }, [
+    { at: -0.25, expect: '50% 62.5%' },
+    { at: 0, expect: '50% 50%' },
+    { at: 0.25, expect: '50% 37.5%' },
+    { at: 0.5, expect: '50% 25%' },
+    { at: 0.75, expect: '50% 12.5%' },
+    { at: 1, expect: '50% 0%' },
+    { at: 1.25, expect: '50% -12.5%' },
+  ]);
+
+  // Animate y axis
+  test_interpolation({
+    property: 'object-position',
+    from: 'initial',
+    to: 'left center',
+  }, [
+    { at: -0.25, expect: '62.5% 50%' },
+    { at: 0, expect: '50% 50%' },
+    { at: 0.25, expect: '37.5% 50%' },
+    { at: 0.5, expect: '25% 50%' },
+    { at: 0.75, expect: '12.5% 50%' },
+    { at: 1, expect: '0% 50%' },
+    { at: 1.25, expect: '-12.5% 50%' },
+  ]);
+
+  // Pixel values
+  test_interpolation({
+    property: 'object-position',
+    from: '20px 20px',
+    to: '100px 100px',
+  }, [
+    { at: -0.25, expect: '0px 0px' },
+    { at: 0, expect: '20px 20px' },
+    { at: 0.25, expect: '40px 40px' },
+    { at: 0.5, expect: '60px 60px' },
+    { at: 0.75, expect: '80px 80px' },
+    { at: 1, expect: '100px 100px' },
+    { at: 1.25, expect: '120px 120px' },
+  ]);
+</script>