diff --git a/Libraries/LibWeb/CSS/GridTrackSize.cpp b/Libraries/LibWeb/CSS/GridTrackSize.cpp
index e6df640d2d2..3e4f26f5b32 100644
--- a/Libraries/LibWeb/CSS/GridTrackSize.cpp
+++ b/Libraries/LibWeb/CSS/GridTrackSize.cpp
@@ -245,7 +245,7 @@ GridTrackSizeList GridTrackSizeList::make_none()
 String GridTrackSizeList::to_string() const
 {
     if (m_list.is_empty())
-        return "auto"_string;
+        return "none"_string;
 
     StringBuilder builder;
     for (auto const& line_definition_or_name : m_list) {
diff --git a/Tests/LibWeb/Text/expected/css/CSSStyleProperties-all-supported-properties-and-default-values.txt b/Tests/LibWeb/Text/expected/css/CSSStyleProperties-all-supported-properties-and-default-values.txt
index b61950d319f..ce05f2e1957 100644
--- a/Tests/LibWeb/Text/expected/css/CSSStyleProperties-all-supported-properties-and-default-values.txt
+++ b/Tests/LibWeb/Text/expected/css/CSSStyleProperties-all-supported-properties-and-default-values.txt
@@ -396,10 +396,10 @@ All supported properties and their default values exposed from CSSStylePropertie
 'grid-template': ''
 'gridTemplateAreas': 'none'
 'grid-template-areas': 'none'
-'gridTemplateColumns': 'auto'
-'grid-template-columns': 'auto'
-'gridTemplateRows': 'auto'
-'grid-template-rows': 'auto'
+'gridTemplateColumns': 'none'
+'grid-template-columns': 'none'
+'gridTemplateRows': 'none'
+'grid-template-rows': 'none'
 'height': '0px'
 'imageRendering': 'auto'
 'image-rendering': 'auto'
diff --git a/Tests/LibWeb/Text/expected/css/calc-coverage.txt b/Tests/LibWeb/Text/expected/css/calc-coverage.txt
index 0fa4fcf0122..59d59e38ed4 100644
--- a/Tests/LibWeb/Text/expected/css/calc-coverage.txt
+++ b/Tests/LibWeb/Text/expected/css/calc-coverage.txt
@@ -76,14 +76,14 @@ font-weight: 'calc(2)' -> '2'
 font-weight: 'calc(2 * var(--n))' -> '4'
 font-width: 'calc(2%)' -> '2%'
 font-width: 'calc(2% * var(--n))' -> '4%'
-grid-auto-columns: 'calc(2fr)' -> 'auto'
-grid-auto-columns: 'calc(2fr * var(--n))' -> 'auto'
-grid-auto-rows: 'calc(2fr)' -> 'auto'
-grid-auto-rows: 'calc(2fr * var(--n))' -> 'auto'
-grid-template-columns: 'calc(2fr)' -> 'auto'
-grid-template-columns: 'calc(2fr * var(--n))' -> 'auto'
-grid-template-rows: 'calc(2fr)' -> 'auto'
-grid-template-rows: 'calc(2fr * var(--n))' -> 'auto'
+grid-auto-columns: 'calc(2fr)' -> 'none'
+grid-auto-columns: 'calc(2fr * var(--n))' -> 'none'
+grid-auto-rows: 'calc(2fr)' -> 'none'
+grid-auto-rows: 'calc(2fr * var(--n))' -> 'none'
+grid-template-columns: 'calc(2fr)' -> 'none'
+grid-template-columns: 'calc(2fr * var(--n))' -> 'none'
+grid-template-rows: 'calc(2fr)' -> 'none'
+grid-template-rows: 'calc(2fr * var(--n))' -> 'none'
 height: 'calc(2px)' -> '2px'
 height: 'calc(2px * var(--n))' -> '4px'
 left: 'calc(2px)' -> '2px'
diff --git a/Tests/LibWeb/Text/expected/css/getComputedStyle-print-all.txt b/Tests/LibWeb/Text/expected/css/getComputedStyle-print-all.txt
index 224b0539498..8d0ee4ec9d2 100644
--- a/Tests/LibWeb/Text/expected/css/getComputedStyle-print-all.txt
+++ b/Tests/LibWeb/Text/expected/css/getComputedStyle-print-all.txt
@@ -146,8 +146,8 @@ grid-column-start: auto
 grid-row-end: auto
 grid-row-start: auto
 grid-template-areas: none
-grid-template-columns: auto
-grid-template-rows: auto
+grid-template-columns: none
+grid-template-rows: none
 height: 2100px
 inline-size: 784px
 inset-block-end: auto
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/inheritance.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/inheritance.txt
new file mode 100644
index 00000000000..ed54ed852f6
--- /dev/null
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/inheritance.txt
@@ -0,0 +1,25 @@
+Harness status: OK
+
+Found 20 tests
+
+20 Pass
+Pass	Property grid-auto-columns has initial value auto
+Pass	Property grid-auto-columns does not inherit
+Pass	Property grid-auto-flow has initial value row
+Pass	Property grid-auto-flow does not inherit
+Pass	Property grid-auto-rows has initial value auto
+Pass	Property grid-auto-rows does not inherit
+Pass	Property grid-column-end has initial value auto
+Pass	Property grid-column-end does not inherit
+Pass	Property grid-column-start has initial value auto
+Pass	Property grid-column-start does not inherit
+Pass	Property grid-row-end has initial value auto
+Pass	Property grid-row-end does not inherit
+Pass	Property grid-row-start has initial value auto
+Pass	Property grid-row-start does not inherit
+Pass	Property grid-template-areas has initial value none
+Pass	Property grid-template-areas does not inherit
+Pass	Property grid-template-columns has initial value none
+Pass	Property grid-template-columns does not inherit
+Pass	Property grid-template-rows has initial value none
+Pass	Property grid-template-rows does not inherit
\ No newline at end of file
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-columns-rows-get-set-multiple.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-columns-rows-get-set-multiple.txt
index 3ad90127c59..edf09068564 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-columns-rows-get-set-multiple.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-columns-rows-get-set-multiple.txt
@@ -2,8 +2,8 @@ Harness status: OK
 
 Found 40 tests
 
-24 Pass
-16 Fail
+32 Pass
+8 Fail
 Pass	Test getting grid-template-columns and grid-template-rows set through CSS for element 'gridWithFixedElement' : grid-template-columns = '7px 11px', grid-template-rows = '17px 2px'
 Pass	Test getting grid-template-columns and grid-template-rows set through CSS for element 'gridWithPercentElement' : grid-template-columns = '400px 800px', grid-template-rows = '150px 450px'
 Fail	Test getting grid-template-columns and grid-template-rows set through CSS for element 'gridWithPercentWithoutSize' : grid-template-columns = '3.5px 7px', grid-template-rows = '4px 12px'
@@ -31,16 +31,16 @@ Pass	Test getting and setting grid-template-rows and grid-template-columns throu
 Pass	Test getting and setting grid-template-rows and grid-template-columns through JS: grid-template-columns = '25px 20px', element.style.gridTemplateColumns = 'calc(25px) calc(2em)', grid-template-rows = '0px 60px', element.style.gridTemplateRows = 'auto calc(10%)'
 Pass	Test getting and setting grid-template-rows and grid-template-columns through JS: grid-template-columns = '345px 92px', element.style.gridTemplateColumns = 'calc(25px + 40%) minmax(min-content, calc(10% + 12px))', grid-template-rows = '100px 0px', element.style.gridTemplateRows = 'minmax(calc(75% - 350px), max-content) auto'
 Fail	Test setting wrong/invalid values through CSS
-Fail	Test setting bad JS values: grid-template-columns = 'none auto', grid-template-rows = 'none auto'
-Fail	Test setting bad JS values: grid-template-columns = 'none 16em', grid-template-rows = 'none 56%'
-Fail	Test setting bad JS values: grid-template-columns = 'none none', grid-template-rows = 'none none'
-Fail	Test setting bad JS values: grid-template-columns = 'auto none', grid-template-rows = 'auto none'
-Fail	Test setting bad JS values: grid-template-columns = 'auto none 16em', grid-template-rows = 'auto 18em none'
-Fail	Test setting bad JS values: grid-template-columns = '-webkit-fit-content -webkit-fit-content', grid-template-rows = '-webkit-fit-available -webkit-fit-available'
+Pass	Test setting bad JS values: grid-template-columns = 'none auto', grid-template-rows = 'none auto'
+Pass	Test setting bad JS values: grid-template-columns = 'none 16em', grid-template-rows = 'none 56%'
+Pass	Test setting bad JS values: grid-template-columns = 'none none', grid-template-rows = 'none none'
+Pass	Test setting bad JS values: grid-template-columns = 'auto none', grid-template-rows = 'auto none'
+Pass	Test setting bad JS values: grid-template-columns = 'auto none 16em', grid-template-rows = 'auto 18em none'
+Pass	Test setting bad JS values: grid-template-columns = '-webkit-fit-content -webkit-fit-content', grid-template-rows = '-webkit-fit-available -webkit-fit-available'
 Fail	Test setting bad JS values: grid-template-columns = '-10px minmax(16px, 32px)', grid-template-rows = 'minmax(10%, 15%) -10vw'
 Fail	Test setting bad JS values: grid-template-columns = '10px minmax(16px, -1vw)', grid-template-rows = 'minmax(-1%, 15%) 10vw'
 Fail	Test setting bad JS values: grid-template-columns = '10px calc(16px 30px)', grid-template-rows = 'calc(25px + auto) 2em'
-Fail	Test setting bad JS values: grid-template-columns = 'minmax(min-content, calc() 250px', grid-template-rows = 'calc(2em('
+Pass	Test setting bad JS values: grid-template-columns = 'minmax(min-content, calc() 250px', grid-template-rows = 'calc(2em('
 Fail	Test setting grid-template-columns and grid-template-rows to 'inherit' through JS
-Fail	Test the default value
+Pass	Test the default value
 Fail	Test setting grid-template-columns and grid-template-rows to 'initial' through JS
\ No newline at end of file
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-shorthand.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-shorthand.txt
index ebba5da5a66..0713219c85c 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-shorthand.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-shorthand.txt
@@ -2,14 +2,14 @@ Harness status: OK
 
 Found 63 tests
 
-21 Pass
-42 Fail
+24 Pass
+39 Fail
 Fail	e.style['grid'] = "none" should set grid-auto-columns
 Fail	e.style['grid'] = "none" should set grid-auto-flow
 Fail	e.style['grid'] = "none" should set grid-auto-rows
 Pass	e.style['grid'] = "none" should set grid-template-areas
-Fail	e.style['grid'] = "none" should set grid-template-columns
-Fail	e.style['grid'] = "none" should set grid-template-rows
+Pass	e.style['grid'] = "none" should set grid-template-columns
+Pass	e.style['grid'] = "none" should set grid-template-rows
 Pass	e.style['grid'] = "none" should not set unrelated longhands
 Fail	e.style['grid'] = "10px / 20%" should set grid-auto-columns
 Fail	e.style['grid'] = "10px / 20%" should set grid-auto-flow
@@ -23,7 +23,7 @@ Fail	e.style['grid'] = "none / 10px" should set grid-auto-flow
 Fail	e.style['grid'] = "none / 10px" should set grid-auto-rows
 Pass	e.style['grid'] = "none / 10px" should set grid-template-areas
 Pass	e.style['grid'] = "none / 10px" should set grid-template-columns
-Fail	e.style['grid'] = "none / 10px" should set grid-template-rows
+Pass	e.style['grid'] = "none / 10px" should set grid-template-rows
 Pass	e.style['grid'] = "none / 10px" should not set unrelated longhands
 Fail	e.style['grid'] = "fit-content(calc(-0.5em + 10px)) / fit-content(calc(0.5em + 10px))" should set grid-auto-columns
 Fail	e.style['grid'] = "fit-content(calc(-0.5em + 10px)) / fit-content(calc(0.5em + 10px))" should set grid-auto-flow
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-columns-computed-nogrid.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-columns-computed-nogrid.txt
index 835361df31e..cce78f68c55 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-columns-computed-nogrid.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-columns-computed-nogrid.txt
@@ -2,9 +2,9 @@ Harness status: OK
 
 Found 32 tests
 
-12 Pass
-20 Fail
-Fail	Property grid-template-columns value 'none'
+13 Pass
+19 Fail
+Pass	Property grid-template-columns value 'none'
 Pass	Property grid-template-columns value '1px'
 Pass	Property grid-template-columns value '1px [a]'
 Pass	Property grid-template-columns value '1px [a] 2px'
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-columns-valid.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-columns-valid.txt
index 84ca70977e3..5b22c3e7752 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-columns-valid.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-columns-valid.txt
@@ -2,9 +2,9 @@ Harness status: OK
 
 Found 34 tests
 
-26 Pass
-8 Fail
-Fail	e.style['grid-template-columns'] = "none" should set the property value
+27 Pass
+7 Fail
+Pass	e.style['grid-template-columns'] = "none" should set the property value
 Pass	e.style['grid-template-columns'] = "10px" should set the property value
 Pass	e.style['grid-template-columns'] = "20%" should set the property value
 Pass	e.style['grid-template-columns'] = "calc(-0.5em + 10px)" should set the property value
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-rows-computed-nogrid.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-rows-computed-nogrid.txt
index df8b1571a87..552f7da16f1 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-rows-computed-nogrid.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-rows-computed-nogrid.txt
@@ -2,9 +2,9 @@ Harness status: OK
 
 Found 24 tests
 
-10 Pass
-14 Fail
-Fail	Property grid-template-rows value 'none'
+11 Pass
+13 Fail
+Pass	Property grid-template-rows value 'none'
 Pass	Property grid-template-rows value '1px'
 Pass	Property grid-template-rows value '1px [a]'
 Pass	Property grid-template-rows value '1px [a] 2px'
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-rows-valid.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-rows-valid.txt
index e71164ab88f..c461a498386 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-rows-valid.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-rows-valid.txt
@@ -2,9 +2,9 @@ Harness status: OK
 
 Found 34 tests
 
-26 Pass
-8 Fail
-Fail	e.style['grid-template-rows'] = "none" should set the property value
+27 Pass
+7 Fail
+Pass	e.style['grid-template-rows'] = "none" should set the property value
 Pass	e.style['grid-template-rows'] = "10px" should set the property value
 Pass	e.style['grid-template-rows'] = "20%" should set the property value
 Pass	e.style['grid-template-rows'] = "calc(-0.5em + 10px)" should set the property value
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-shorthand.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-shorthand.txt
index 43fa1b820e1..b9f5df48468 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-shorthand.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-shorthand.txt
@@ -2,11 +2,11 @@ Harness status: OK
 
 Found 24 tests
 
-18 Pass
-6 Fail
+20 Pass
+4 Fail
 Pass	e.style['grid-template'] = "none" should set grid-template-areas
-Fail	e.style['grid-template'] = "none" should set grid-template-columns
-Fail	e.style['grid-template'] = "none" should set grid-template-rows
+Pass	e.style['grid-template'] = "none" should set grid-template-columns
+Pass	e.style['grid-template'] = "none" should set grid-template-rows
 Pass	e.style['grid-template'] = "none" should not set unrelated longhands
 Pass	e.style['grid-template'] = "10px / 20%" should set grid-template-areas
 Pass	e.style['grid-template'] = "10px / 20%" should set grid-template-columns
diff --git a/Tests/LibWeb/Text/input/wpt-import/css/css-grid/inheritance.html b/Tests/LibWeb/Text/input/wpt-import/css/css-grid/inheritance.html
new file mode 100644
index 00000000000..c6eb3865e99
--- /dev/null
+++ b/Tests/LibWeb/Text/input/wpt-import/css/css-grid/inheritance.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Inheritance of CSS Grid Layout properties</title>
+<link rel="help" href="https://drafts.csswg.org/css-grid/#property-index">
+<meta name="assert" content="Properties inherit or not according to the spec.">
+<meta name="assert" content="Properties have initial values according to the spec.">
+<script src="../../resources/testharness.js"></script>
+<script src="../../resources/testharnessreport.js"></script>
+<script src="../../css/support/inheritance-testcommon.js"></script>
+</head>
+<body>
+<div id="container">
+<div id="target"></div>
+</div>
+<script>
+assert_not_inherited('grid-auto-columns', 'auto', '10px');
+assert_not_inherited('grid-auto-flow', 'row', 'column dense');
+assert_not_inherited('grid-auto-rows', 'auto', '10px');
+assert_not_inherited('grid-column-end', 'auto', 'span 2');
+assert_not_inherited('grid-column-start', 'auto', 'span 2');
+assert_not_inherited('grid-row-end', 'auto', 'span 2');
+assert_not_inherited('grid-row-start', 'auto', 'span 2');
+assert_not_inherited('grid-template-areas', 'none', '"one two" "three four"');
+assert_not_inherited('grid-template-columns', 'none', '10px');
+assert_not_inherited('grid-template-rows', 'none', '10px');
+</script>
+</body>
+</html>