diff --git a/Tests/LibWeb/Layout/input/grid/auto-fill.html b/Tests/LibWeb/Layout/input/grid/auto-fill.html
index 93351882ffc..b283c8dfed3 100644
--- a/Tests/LibWeb/Layout/input/grid/auto-fill.html
+++ b/Tests/LibWeb/Layout/input/grid/auto-fill.html
@@ -1,8 +1,4 @@
 <style>
-  body {
-    font-family: 'SerenitySans';
-  }
-
   .grid-container {
     display: grid;
     background-color: lightsalmon;
diff --git a/Tests/LibWeb/Layout/input/grid/auto-fit.html b/Tests/LibWeb/Layout/input/grid/auto-fit.html
index 9738e847e8f..747c1758c59 100644
--- a/Tests/LibWeb/Layout/input/grid/auto-fit.html
+++ b/Tests/LibWeb/Layout/input/grid/auto-fit.html
@@ -1,8 +1,4 @@
 <style>
-  body {
-    font-family: 'SerenitySans';
-  }
-
   .grid-container {
     display: grid;
     background-color: lightsalmon;
diff --git a/Tests/LibWeb/Layout/input/grid/basic.html b/Tests/LibWeb/Layout/input/grid/basic.html
index c4fc38a3967..df50f3cef8f 100644
--- a/Tests/LibWeb/Layout/input/grid/basic.html
+++ b/Tests/LibWeb/Layout/input/grid/basic.html
@@ -1,8 +1,4 @@
 <style>
-  body {
-    font-family: 'SerenitySans';
-  }
-
   .grid-container {
     display: grid;
     background-color: lightsalmon;
diff --git a/Tests/LibWeb/Layout/input/grid/borders.html b/Tests/LibWeb/Layout/input/grid/borders.html
index e43cf1fe55f..e0e433d0736 100644
--- a/Tests/LibWeb/Layout/input/grid/borders.html
+++ b/Tests/LibWeb/Layout/input/grid/borders.html
@@ -1,8 +1,4 @@
 <style>
-  body {
-    font-family: 'SerenitySans';
-  }
-
   .grid-container {
     display: grid;
     background-color: lightsalmon;
diff --git a/Tests/LibWeb/Layout/input/grid/different-column-sizes.html b/Tests/LibWeb/Layout/input/grid/different-column-sizes.html
index 0a0d36b0ff5..fca4578e66a 100644
--- a/Tests/LibWeb/Layout/input/grid/different-column-sizes.html
+++ b/Tests/LibWeb/Layout/input/grid/different-column-sizes.html
@@ -1,8 +1,4 @@
 <style>
-  body {
-    font-family: 'SerenitySans';
-  }
-
   .grid-container {
     display: grid;
     background-color: lightsalmon;
diff --git a/Tests/LibWeb/Layout/input/grid/gap.html b/Tests/LibWeb/Layout/input/grid/gap.html
index 9dd5f6f5fd3..2fc70eeb68f 100644
--- a/Tests/LibWeb/Layout/input/grid/gap.html
+++ b/Tests/LibWeb/Layout/input/grid/gap.html
@@ -1,8 +1,4 @@
 <style>
-  body {
-    font-family: 'SerenitySans';
-  }
-
   .grid-container {
     display: grid;
     background-color: lightsalmon;
diff --git a/Tests/LibWeb/Layout/input/grid/grid-template.html b/Tests/LibWeb/Layout/input/grid/grid-template.html
index abd8a6970e9..d4a783d6495 100644
--- a/Tests/LibWeb/Layout/input/grid/grid-template.html
+++ b/Tests/LibWeb/Layout/input/grid/grid-template.html
@@ -1,7 +1,4 @@
 <style>
-  body {
-    font-family: 'SerenitySans';
-  }
   .mw-page-container-inner {
     display: grid;
     grid-template: min-content min-content 1fr min-content / 12.25em minmax(0, 1fr);
diff --git a/Tests/LibWeb/Layout/input/grid/image-in-grid.html b/Tests/LibWeb/Layout/input/grid/image-in-grid.html
index 3828deaf58e..8ce9cb509b5 100644
--- a/Tests/LibWeb/Layout/input/grid/image-in-grid.html
+++ b/Tests/LibWeb/Layout/input/grid/image-in-grid.html
@@ -1,8 +1,4 @@
 <style>
-  body {
-    font-family: 'SerenitySans';
-  }
-
   .grid-container {
     display: grid;
     background-color: lightsalmon;
diff --git a/Tests/LibWeb/Layout/input/grid/intrinsic-sized-column.html b/Tests/LibWeb/Layout/input/grid/intrinsic-sized-column.html
index f40127616e7..953e0b4c5ec 100644
--- a/Tests/LibWeb/Layout/input/grid/intrinsic-sized-column.html
+++ b/Tests/LibWeb/Layout/input/grid/intrinsic-sized-column.html
@@ -5,7 +5,6 @@
   <style>
     body {
       float: left;
-      font-family: 'SerenitySans';
     }
 
     .grid {
diff --git a/Tests/LibWeb/Layout/input/grid/intrinsic-sized-grid.html b/Tests/LibWeb/Layout/input/grid/intrinsic-sized-grid.html
index 1da9823c593..e2265762162 100644
--- a/Tests/LibWeb/Layout/input/grid/intrinsic-sized-grid.html
+++ b/Tests/LibWeb/Layout/input/grid/intrinsic-sized-grid.html
@@ -4,7 +4,6 @@
   }
   body {
     float: left;
-    font-family: 'SerenitySans';
   }
   .grid {
     display: grid;
diff --git a/Tests/LibWeb/Layout/input/grid/min-max-content.html b/Tests/LibWeb/Layout/input/grid/min-max-content.html
index a18a8bb61ab..b98fada4b1f 100644
--- a/Tests/LibWeb/Layout/input/grid/min-max-content.html
+++ b/Tests/LibWeb/Layout/input/grid/min-max-content.html
@@ -1,8 +1,4 @@
 <style>
-  body {
-    font-family: 'SerenitySans';
-  }
-
   .grid-container {
     display: grid;
     background-color: lightsalmon;
diff --git a/Tests/LibWeb/Layout/input/grid/minmax.html b/Tests/LibWeb/Layout/input/grid/minmax.html
index c2aad803618..56cc996fd82 100644
--- a/Tests/LibWeb/Layout/input/grid/minmax.html
+++ b/Tests/LibWeb/Layout/input/grid/minmax.html
@@ -1,8 +1,4 @@
 <style>
-  body {
-    font-family: 'SerenitySans';
-  }
-
   .grid-container {
     display: grid;
     background-color: lightsalmon;
diff --git a/Tests/LibWeb/Layout/input/grid/named-tracks.html b/Tests/LibWeb/Layout/input/grid/named-tracks.html
index 346fc043b5d..caa6ff53255 100644
--- a/Tests/LibWeb/Layout/input/grid/named-tracks.html
+++ b/Tests/LibWeb/Layout/input/grid/named-tracks.html
@@ -1,8 +1,4 @@
 <style>
-  body {
-    font-family: 'SerenitySans';
-  }
-
   .grid-container {
     display: grid;
     background-color: lightsalmon;
diff --git a/Tests/LibWeb/Layout/input/grid/positions-and-spans.html b/Tests/LibWeb/Layout/input/grid/positions-and-spans.html
index 683fd308367..5f88180ffcb 100644
--- a/Tests/LibWeb/Layout/input/grid/positions-and-spans.html
+++ b/Tests/LibWeb/Layout/input/grid/positions-and-spans.html
@@ -1,8 +1,4 @@
 <style>
-  body {
-    font-family: 'SerenitySans';
-  }
-
   .grid-container {
     display: grid;
     background-color: lightsalmon;
diff --git a/Tests/LibWeb/Layout/input/grid/repeat.html b/Tests/LibWeb/Layout/input/grid/repeat.html
index 16e178a9339..4f3f8341e4a 100644
--- a/Tests/LibWeb/Layout/input/grid/repeat.html
+++ b/Tests/LibWeb/Layout/input/grid/repeat.html
@@ -1,8 +1,4 @@
 <style>
-  body {
-    font-family: 'SerenitySans';
-  }
-
   .grid-container {
     display: grid;
     background-color: lightsalmon;
diff --git a/Tests/LibWeb/Layout/input/grid/row-height.html b/Tests/LibWeb/Layout/input/grid/row-height.html
index a1fb174fc01..3e225059b25 100644
--- a/Tests/LibWeb/Layout/input/grid/row-height.html
+++ b/Tests/LibWeb/Layout/input/grid/row-height.html
@@ -1,8 +1,4 @@
 <style>
-  body {
-    font-family: 'SerenitySans';
-  }
-
   .grid-container {
     display: grid;
     background-color: lightsalmon;
diff --git a/Tests/LibWeb/Layout/input/grid/template-areas.html b/Tests/LibWeb/Layout/input/grid/template-areas.html
index 51dd4c42240..aa5ab44103d 100644
--- a/Tests/LibWeb/Layout/input/grid/template-areas.html
+++ b/Tests/LibWeb/Layout/input/grid/template-areas.html
@@ -1,8 +1,4 @@
 <style>
-  body {
-    font-family: 'SerenitySans';
-  }
-
   .grid-container {
     display: grid;
     background-color: lightsalmon;
diff --git a/Tests/LibWeb/Layout/layout_test.sh b/Tests/LibWeb/Layout/layout_test.sh
index 11368c1d293..e52103ac497 100755
--- a/Tests/LibWeb/Layout/layout_test.sh
+++ b/Tests/LibWeb/Layout/layout_test.sh
@@ -16,7 +16,7 @@ find "${SCRIPT_DIR}/input/" -type f -name "*.html" -print0 | while IFS= read -r
     input_html_file=${input_html_path/${SCRIPT_DIR}"/input/"/}
     input_html_file=${input_html_file/".html"/}
 
-    output_layout_dump=$(cd "${LADYBIRD_BUILD_DIR}"; timeout 300s "${BROWSER_BINARY}" -d "${input_html_path}")
+    output_layout_dump=$(cd "${LADYBIRD_BUILD_DIR}"; timeout 300s "${BROWSER_BINARY}" --layout-test-mode -d "${input_html_path}")
     expected_layout_dump_path="${SCRIPT_DIR}/expected/${input_html_file}.txt"
 
     if cmp <(echo "${output_layout_dump}") "${expected_layout_dump_path}"; then