diff --git a/Libraries/LibWeb/CSS/CharacterTypes.h b/Libraries/LibWeb/CSS/CharacterTypes.h
new file mode 100644
index 00000000000..7525554134a
--- /dev/null
+++ b/Libraries/LibWeb/CSS/CharacterTypes.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2024, the Ladybird developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/CharacterTypes.h>
+#include <AK/Types.h>
+
+namespace Web::CSS {
+
+// https://www.w3.org/TR/css-syntax-3/#digit
+constexpr bool is_digit(u32 code_point)
+{
+    // A code point between U+0030 DIGIT ZERO (0) and U+0039 DIGIT NINE (9) inclusive.
+    return code_point >= 0x30 && code_point <= 0x39;
+}
+
+// https://www.w3.org/TR/css-syntax-3/#hex-digit
+constexpr bool is_hex_digit(u32 code_point)
+{
+    // A digit,
+    // or a code point between U+0041 LATIN CAPITAL LETTER A (A) and U+0046 LATIN CAPITAL LETTER F (F) inclusive,
+    // or a code point between U+0061 LATIN SMALL LETTER A (a) and U+0066 LATIN SMALL LETTER F (f) inclusive.
+    return is_digit(code_point) || (code_point >= 0x41 && code_point <= 0x46) || (code_point >= 0x61 && code_point <= 0x66);
+}
+
+// https://www.w3.org/TR/css-syntax-3/#ident-start-code-point
+constexpr bool is_ident_start_code_point(u32 code_point)
+{
+    // A letter, a non-ASCII code point, or U+005F LOW LINE (_).
+    // Note: the is_unicode condition is used to reject the Tokenizer's EOF codepoint.
+    return is_ascii_alpha(code_point) || (!is_ascii(code_point) && is_unicode(code_point)) || code_point == '_';
+}
+
+// https://www.w3.org/TR/css-syntax-3/#ident-code-point
+constexpr bool is_ident_code_point(u32 code_point)
+{
+    // An ident-start code point, a digit, or U+002D HYPHEN-MINUS (-).
+    return is_ident_start_code_point(code_point) || is_ascii_digit(code_point) || code_point == '-';
+}
+
+// https://www.w3.org/TR/css-syntax-3/#non-printable-code-point
+constexpr bool is_non_printable_code_point(u32 code_point)
+{
+    return code_point <= 0x8 || code_point == 0xB || (code_point >= 0xE && code_point <= 0x1F) || code_point == 0x7F;
+}
+
+// https://www.w3.org/TR/css-syntax-3/#newline
+constexpr inline bool is_newline(u32 code_point)
+{
+    // U+000A LINE FEED.
+    // Note that U+000D CARRIAGE RETURN and U+000C FORM FEED are not included in this definition,
+    // as they are converted to U+000A LINE FEED during preprocessing.
+    return code_point == 0xA;
+}
+
+// https://www.w3.org/TR/css-syntax-3/#whitespace
+constexpr bool is_whitespace(u32 code_point)
+{
+    // A newline, U+0009 CHARACTER TABULATION, or U+0020 SPACE.
+    return is_newline(code_point) || code_point == '\t' || code_point == ' ';
+}
+
+// https://www.w3.org/TR/css-syntax-3/#maximum-allowed-code-point
+constexpr bool is_greater_than_maximum_allowed_code_point(u32 code_point)
+{
+    // The greatest code point defined by Unicode: U+10FFFF.
+    return code_point > 0x10FFFF;
+}
+}
diff --git a/Libraries/LibWeb/CSS/Parser/Parser.cpp b/Libraries/LibWeb/CSS/Parser/Parser.cpp
index 5d8ff1db63e..77f3975998c 100644
--- a/Libraries/LibWeb/CSS/Parser/Parser.cpp
+++ b/Libraries/LibWeb/CSS/Parser/Parser.cpp
@@ -22,6 +22,7 @@
 #include <LibWeb/CSS/CSSStyleSheet.h>
 #include <LibWeb/CSS/CSSStyleValue.h>
 #include <LibWeb/CSS/CalculatedOr.h>
+#include <LibWeb/CSS/CharacterTypes.h>
 #include <LibWeb/CSS/EdgeRect.h>
 #include <LibWeb/CSS/MediaList.h>
 #include <LibWeb/CSS/Parser/Parser.h>
@@ -7585,20 +7586,60 @@ RefPtr<CSSStyleValue> Parser::parse_grid_shorthand_value(TokenStream<ComponentVa
 RefPtr<CSSStyleValue> Parser::parse_grid_template_areas_value(TokenStream<ComponentValue>& tokens)
 {
     // none | <string>+
-    Vector<Vector<String>> grid_area_rows;
-
     if (auto none = parse_all_as_single_keyword_value(tokens, Keyword::None))
-        return GridTemplateAreaStyleValue::create(move(grid_area_rows));
+        return GridTemplateAreaStyleValue::create({});
+
+    auto is_full_stop = [](u32 code_point) {
+        return code_point == '.';
+    };
+
+    auto consume_while = [](Utf8CodePointIterator& code_points, AK::Function<bool(u32)> predicate) {
+        StringBuilder builder;
+        while (!code_points.done() && predicate(*code_points)) {
+            builder.append_code_point(*code_points);
+            ++code_points;
+        }
+        return MUST(builder.to_string());
+    };
+
+    Vector<Vector<String>> grid_area_rows;
+    Optional<size_t> column_count;
 
     auto transaction = tokens.begin_transaction();
     while (tokens.has_next_token() && tokens.next_token().is(Token::Type::String)) {
         Vector<String> grid_area_columns;
-        auto const parts = MUST(tokens.consume_a_token().token().string().to_string().split(' '));
-        for (auto& part : parts) {
-            grid_area_columns.append(part);
+        auto string = tokens.consume_a_token().token().string().code_points();
+        auto code_points = string.begin();
+
+        while (!code_points.done()) {
+            if (is_whitespace(*code_points)) {
+                consume_while(code_points, is_whitespace);
+            } else if (is_full_stop(*code_points)) {
+                consume_while(code_points, *is_full_stop);
+                grid_area_columns.append("."_string);
+            } else if (is_ident_code_point(*code_points)) {
+                auto token = consume_while(code_points, is_ident_code_point);
+                grid_area_columns.append(move(token));
+            } else {
+                return nullptr;
+            }
         }
+
+        if (grid_area_columns.is_empty())
+            return nullptr;
+
+        if (column_count.has_value()) {
+            if (grid_area_columns.size() != column_count)
+                return nullptr;
+        } else {
+            column_count = grid_area_columns.size();
+        }
+
         grid_area_rows.append(move(grid_area_columns));
     }
+
+    // FIXME: If a named grid area spans multiple grid cells, but those cells do not form a single filled-in rectangle, the declaration is invalid.
+
     transaction.commit();
     return GridTemplateAreaStyleValue::create(grid_area_rows);
 }
diff --git a/Libraries/LibWeb/CSS/Parser/Tokenizer.cpp b/Libraries/LibWeb/CSS/Parser/Tokenizer.cpp
index 083c823d405..a0b1ed8ed40 100644
--- a/Libraries/LibWeb/CSS/Parser/Tokenizer.cpp
+++ b/Libraries/LibWeb/CSS/Parser/Tokenizer.cpp
@@ -5,12 +5,12 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#include <AK/CharacterTypes.h>
 #include <AK/Debug.h>
 #include <AK/FloatingPointStringConversions.h>
 #include <AK/SourceLocation.h>
 #include <AK/Vector.h>
 #include <LibTextCodec/Decoder.h>
+#include <LibWeb/CSS/CharacterTypes.h>
 #include <LibWeb/CSS/Parser/Tokenizer.h>
 #include <LibWeb/Infra/Strings.h>
 
@@ -35,41 +35,11 @@ static inline bool is_quotation_mark(u32 code_point)
     return code_point == 0x22;
 }
 
-static inline bool is_greater_than_maximum_allowed_code_point(u32 code_point)
-{
-    return code_point > 0x10FFFF;
-}
-
-static inline bool is_low_line(u32 code_point)
-{
-    return code_point == 0x5F;
-}
-
-// https://www.w3.org/TR/css-syntax-3/#ident-start-code-point
-static inline bool is_ident_start_code_point(u32 code_point)
-{
-    // FIXME: We use !is_ascii() for "non-ASCII code point" in the spec, but it's not quite right -
-    //        it treats EOF as a valid! The spec also lacks a definition of code point. For now, the
-    //        !is_eof() check is a hack, but it should work.
-    return !is_eof(code_point) && (is_ascii_alpha(code_point) || !is_ascii(code_point) || is_low_line(code_point));
-}
-
 static inline bool is_hyphen_minus(u32 code_point)
 {
     return code_point == 0x2D;
 }
 
-// https://www.w3.org/TR/css-syntax-3/#ident-code-point
-static inline bool is_ident_code_point(u32 code_point)
-{
-    return is_ident_start_code_point(code_point) || is_ascii_digit(code_point) || is_hyphen_minus(code_point);
-}
-
-static inline bool is_non_printable(u32 code_point)
-{
-    return code_point <= 0x8 || code_point == 0xB || (code_point >= 0xE && code_point <= 0x1F) || code_point == 0x7F;
-}
-
 static inline bool is_number_sign(u32 code_point)
 {
     return code_point == 0x23;
@@ -110,11 +80,6 @@ static inline bool is_full_stop(u32 code_point)
     return code_point == 0x2E;
 }
 
-static inline bool is_newline(u32 code_point)
-{
-    return code_point == 0xA;
-}
-
 static inline bool is_asterisk(u32 code_point)
 {
     return code_point == 0x2A;
@@ -170,11 +135,6 @@ static inline bool is_closed_curly_bracket(u32 code_point)
     return code_point == 0x7D;
 }
 
-static inline bool is_whitespace(u32 code_point)
-{
-    return code_point == 0x9 || code_point == 0xA || code_point == 0x20;
-}
-
 static inline bool is_percent(u32 code_point)
 {
     return code_point == 0x25;
@@ -400,14 +360,14 @@ u32 Tokenizer::consume_escaped_code_point()
     auto input = next_code_point();
 
     // hex digit
-    if (is_ascii_hex_digit(input)) {
+    if (is_hex_digit(input)) {
         // Consume as many hex digits as possible, but no more than 5.
         // Note that this means 1-6 hex digits have been consumed in total.
         StringBuilder builder;
         builder.append_code_point(input);
 
         size_t counter = 0;
-        while (is_ascii_hex_digit(peek_code_point()) && counter++ < 5) {
+        while (is_hex_digit(peek_code_point()) && counter++ < 5) {
             builder.append_code_point(next_code_point());
         }
 
@@ -517,7 +477,7 @@ Number Tokenizer::consume_a_number()
     // 3. While the next input code point is a digit, consume it and append it to repr.
     for (;;) {
         auto digits = peek_code_point();
-        if (!is_ascii_digit(digits))
+        if (!is_digit(digits))
             break;
 
         repr.append_code_point(next_code_point());
@@ -525,7 +485,7 @@ Number Tokenizer::consume_a_number()
 
     // 4. If the next 2 input code points are U+002E FULL STOP (.) followed by a digit, then:
     auto maybe_number = peek_twin();
-    if (is_full_stop(maybe_number.first) && is_ascii_digit(maybe_number.second)) {
+    if (is_full_stop(maybe_number.first) && is_digit(maybe_number.second)) {
         // 1. Consume them.
         // 2. Append them to repr.
         repr.append_code_point(next_code_point());
@@ -537,7 +497,7 @@ Number Tokenizer::consume_a_number()
         // 4. While the next input code point is a digit, consume it and append it to repr.
         for (;;) {
             auto digit = peek_code_point();
-            if (!is_ascii_digit(digit))
+            if (!is_digit(digit))
                 break;
 
             repr.append_code_point(next_code_point());
@@ -549,17 +509,17 @@ Number Tokenizer::consume_a_number()
     // or U+002B PLUS SIGN (+), followed by a digit, then:
     auto maybe_exp = peek_triplet();
     if ((is_E(maybe_exp.first) || is_e(maybe_exp.first))
-        && (((is_plus_sign(maybe_exp.second) || is_hyphen_minus(maybe_exp.second)) && is_ascii_digit(maybe_exp.third))
-            || (is_ascii_digit(maybe_exp.second)))) {
+        && (((is_plus_sign(maybe_exp.second) || is_hyphen_minus(maybe_exp.second)) && is_digit(maybe_exp.third))
+            || (is_digit(maybe_exp.second)))) {
         // 1. Consume them.
         // 2. Append them to repr.
         if (is_plus_sign(maybe_exp.second) || is_hyphen_minus(maybe_exp.second)) {
-            if (is_ascii_digit(maybe_exp.third)) {
+            if (is_digit(maybe_exp.third)) {
                 repr.append_code_point(next_code_point());
                 repr.append_code_point(next_code_point());
                 repr.append_code_point(next_code_point());
             }
-        } else if (is_ascii_digit(maybe_exp.second)) {
+        } else if (is_digit(maybe_exp.second)) {
             repr.append_code_point(next_code_point());
             repr.append_code_point(next_code_point());
         }
@@ -570,7 +530,7 @@ Number Tokenizer::consume_a_number()
         // 4. While the next input code point is a digit, consume it and append it to repr.
         for (;;) {
             auto digits = peek_code_point();
-            if (!is_ascii_digit(digits))
+            if (!is_digit(digits))
                 break;
 
             repr.append_code_point(next_code_point());
@@ -713,7 +673,7 @@ Token Tokenizer::consume_a_url_token()
         // U+0027 APOSTROPHE (')
         // U+0028 LEFT PARENTHESIS (()
         // non-printable code point
-        if (is_quotation_mark(input) || is_apostrophe(input) || is_left_paren(input) || is_non_printable(input)) {
+        if (is_quotation_mark(input) || is_apostrophe(input) || is_left_paren(input) || is_non_printable_code_point(input)) {
             // This is a parse error. Consume the remnants of a bad url, create a <bad-url-token>, and return it.
             log_parse_error();
             consume_the_remnants_of_a_bad_url();
@@ -855,12 +815,12 @@ bool Tokenizer::would_start_a_number(U32Triplet values)
     // U+002D HYPHEN-MINUS (-)
     if (is_plus_sign(values.first) || is_hyphen_minus(values.first)) {
         // If the second code point is a digit, return true.
-        if (is_ascii_digit(values.second))
+        if (is_digit(values.second))
             return true;
 
         // Otherwise, if the second code point is a U+002E FULL STOP (.) and the third
         // code point is a digit, return true.
-        if (is_full_stop(values.second) && is_ascii_digit(values.third))
+        if (is_full_stop(values.second) && is_digit(values.third))
             return true;
 
         // Otherwise, return false.
@@ -870,10 +830,10 @@ bool Tokenizer::would_start_a_number(U32Triplet values)
     // U+002E FULL STOP (.)
     if (is_full_stop(values.first))
         // If the second code point is a digit, return true. Otherwise, return false.
-        return is_ascii_digit(values.second);
+        return is_digit(values.second);
 
     // digit
-    if (is_ascii_digit(values.first))
+    if (is_digit(values.first))
         // Return true.
         return true;
 
@@ -1328,7 +1288,7 @@ Token Tokenizer::consume_a_token()
     }
 
     // digit
-    if (is_ascii_digit(input)) {
+    if (is_digit(input)) {
         dbgln_if(CSS_TOKENIZER_DEBUG, "is digit");
         // Reconsume the current input code point, consume a numeric token, and return it.
         reconsume_current_input_code_point();
diff --git a/Libraries/LibWeb/CSS/StyleValues/GridTemplateAreaStyleValue.cpp b/Libraries/LibWeb/CSS/StyleValues/GridTemplateAreaStyleValue.cpp
index 45c3d93acbc..b03d906fb16 100644
--- a/Libraries/LibWeb/CSS/StyleValues/GridTemplateAreaStyleValue.cpp
+++ b/Libraries/LibWeb/CSS/StyleValues/GridTemplateAreaStyleValue.cpp
@@ -8,6 +8,7 @@
  */
 
 #include "GridTemplateAreaStyleValue.h"
+#include <LibWeb/CSS/Serialize.h>
 
 namespace Web::CSS {
 
@@ -23,13 +24,15 @@ String GridTemplateAreaStyleValue::to_string() const
 
     StringBuilder builder;
     for (size_t y = 0; y < m_grid_template_area.size(); ++y) {
+        if (y != 0)
+            builder.append(' ');
+        StringBuilder row_builder;
         for (size_t x = 0; x < m_grid_template_area[y].size(); ++x) {
-            builder.appendff("{}", m_grid_template_area[y][x]);
-            if (x < m_grid_template_area[y].size() - 1)
-                builder.append(" "sv);
+            if (x != 0)
+                row_builder.append(' ');
+            row_builder.appendff("{}", m_grid_template_area[y][x]);
         }
-        if (y < m_grid_template_area.size() - 1)
-            builder.append(", "sv);
+        serialize_a_string(builder, row_builder.string_view());
     }
     return MUST(builder.to_string());
 }
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/grid-definition/grid-support-grid-template-areas-001.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/grid-definition/grid-support-grid-template-areas-001.txt
new file mode 100644
index 00000000000..033e914fb4d
--- /dev/null
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/grid-definition/grid-support-grid-template-areas-001.txt
@@ -0,0 +1,56 @@
+Summary
+
+Harness status: OK
+
+Rerun
+
+Found 45 tests
+
+36 Pass
+9 Fail
+Details
+Result	Test Name	MessagePass	'grid' with: grid-template-areas: none;	
+Pass	'grid' with: grid-template-areas: "a";	
+Pass	'grid' with: grid-template-areas: ".";	
+Pass	'grid' with: grid-template-areas: "lower UPPER 10 -minus _low 1-st ©copy_right line¶";	
+Pass	'grid' with: grid-template-areas: "a b";	
+Pass	'grid' with: grid-template-areas: "a b" "c d";	
+Pass	'grid' with: grid-template-areas: "a b" "c d";	
+Pass	'grid' with: grid-template-areas: "a b""c d";	
+Pass	'grid' with: grid-template-areas: "a b" "c d";	
+Pass	'grid' with: grid-template-areas: "a b" "c d";	
+Pass	'grid' with: grid-template-areas: "a b" "a b";	
+Pass	'grid' with: grid-template-areas: "a a" "b b";	
+Pass	'grid' with: grid-template-areas: ". a ." "b a c";	
+Pass	'grid' with: grid-template-areas: ".. a ..." "b a c";	
+Pass	'grid' with: grid-template-areas: ".a..." "b a c";	
+Pass	'grid' with: grid-template-areas: "head head" "nav main" "foot .";	
+Pass	'grid' with: grid-template-areas: "head head" "nav main" "foot ....";	
+Pass	'grid' with: grid-template-areas: "head head" "nav main" "foot.";	
+Pass	'grid' with: grid-template-areas: ". header header ." "nav main main main" "nav footer footer .";	
+Pass	'grid' with: grid-template-areas: "... header header ...." "nav main main main" "nav footer footer ....";	
+Pass	'grid' with: grid-template-areas: "...header header...." "nav main main main" "nav footer footer....";	
+Pass	'grid' with: grid-template-areas: "title stats" "score stats" "board board" "ctrls ctrls";	
+Pass	'grid' with: grid-template-areas: "title board" "stats board" "score ctrls";	
+Pass	'grid' with: grid-template-areas: ". a" "b a" ". a";	
+Pass	'grid' with: grid-template-areas: ".. a" "b a" "... a";	
+Pass	'grid' with: grid-template-areas: "..a" "b a" ".a";	
+Pass	'grid' with: grid-template-areas: "a a a" "b b b";	
+Pass	'grid' with: grid-template-areas: ". ." "a a";	
+Pass	'grid' with: grid-template-areas: "... ...." "a a";	
+Pass	'grid' with: grid-template-areas: a;	
+Pass	'grid' with: grid-template-areas: "a" "b c";	
+Pass	'grid' with: grid-template-areas: "a b" "c" "d e";	
+Pass	'grid' with: grid-template-areas: "a b c" "d e";	
+Pass	'grid' with: grid-template-areas: "a b"-"c d";	
+Pass	'grid' with: grid-template-areas: "a b" - "c d";	
+Pass	'grid' with: grid-template-areas: "a b" . "c d";	
+Fail	'grid' with: grid-template-areas: "a b a";	
+Fail	'grid' with: grid-template-areas: "a" "b" "a";	
+Fail	'grid' with: grid-template-areas: "a b" "b b";	
+Fail	'grid' with: grid-template-areas: "b a" "b b";	
+Fail	'grid' with: grid-template-areas: "a b" "b a";	
+Fail	'grid' with: grid-template-areas: "a ." ". a";	
+Fail	'grid' with: grid-template-areas: ",";	
+Fail	'grid' with: grid-template-areas: "10%";	
+Fail	'grid' with: grid-template-areas: "USD$";	
\ No newline at end of file
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-shorthand-serialization.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-shorthand-serialization.txt
index 539aff1f5d8..6cce9dd8d70 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-shorthand-serialization.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-shorthand-serialization.txt
@@ -6,15 +6,15 @@ Rerun
 
 Found 121 tests
 
-26 Pass
-95 Fail
+31 Pass
+90 Fail
 Details
 Result	Test Name	MessageFail	e.style.cssText = grid: auto-flow auto / 100px 100px should set grid	
 Fail	e.style.cssText = grid: auto-flow auto / 100px 100px should set grid-template-areas	
 Pass	e.style.cssText = grid: auto-flow auto / 100px 100px; grid-template-areas: "one two" "three four" should set grid	
 Fail	e.style.cssText = grid: auto-flow auto / 100px 100px; grid-template-areas: "one two" "three four" should set grid-auto-flow	
 Fail	e.style.cssText = grid: auto-flow auto / 100px 100px; grid-template-areas: "one two" "three four" should set grid-auto-rows	
-Fail	e.style.cssText = grid: auto-flow auto / 100px 100px; grid-template-areas: "one two" "three four" should set grid-template-areas	
+Pass	e.style.cssText = grid: auto-flow auto / 100px 100px; grid-template-areas: "one two" "three four" should set grid-template-areas	
 Fail	e.style.cssText = grid: 30px 40px / 50px 60px; grid-auto-flow: column should set grid	
 Pass	e.style.cssText = grid: 30px 40px / 50px 60px; grid-auto-flow: column should set grid-auto-flow	
 Fail	e.style.cssText = grid: 30px 40px / 50px 60px; grid-auto-flow: column should set grid-template	
@@ -115,18 +115,18 @@ Fail	e.style.cssText = grid: auto-flow 1px / none; grid-template-rows: repeat(au
 Fail	e.style.cssText = grid: auto-flow 1px / none; grid-template-rows: repeat(auto-fit, 3px) should set grid-template-columns	
 Fail	e.style.cssText = grid: auto-flow 1px / none; grid-template-rows: repeat(auto-fit, 3px) should set grid-template-rows	
 Fail	e.style.cssText = grid-template-rows: auto auto; grid-template-columns: repeat(2, 3px); grid-template-areas: "one two" "three four" should set grid	
-Fail	e.style.cssText = grid-template-rows: auto auto; grid-template-columns: repeat(2, 3px); grid-template-areas: "one two" "three four" should set grid-template-areas	
+Pass	e.style.cssText = grid-template-rows: auto auto; grid-template-columns: repeat(2, 3px); grid-template-areas: "one two" "three four" should set grid-template-areas	
 Pass	e.style.cssText = grid-template-rows: auto auto; grid-template-columns: repeat(2, 3px); grid-template-areas: "one two" "three four" should set grid-template-columns	
 Pass	e.style.cssText = grid-template-rows: auto auto; grid-template-columns: repeat(2, 3px); grid-template-areas: "one two" "three four" should set grid-template-rows	
 Fail	e.style.cssText = grid-template-rows: auto auto; grid-template-columns: repeat(2, 1fr); grid-template-areas: "one two" "three four" should set grid	
-Fail	e.style.cssText = grid-template-rows: auto auto; grid-template-columns: repeat(2, 1fr); grid-template-areas: "one two" "three four" should set grid-template-areas	
+Pass	e.style.cssText = grid-template-rows: auto auto; grid-template-columns: repeat(2, 1fr); grid-template-areas: "one two" "three four" should set grid-template-areas	
 Pass	e.style.cssText = grid-template-rows: auto auto; grid-template-columns: repeat(2, 1fr); grid-template-areas: "one two" "three four" should set grid-template-columns	
 Pass	e.style.cssText = grid-template-rows: auto auto; grid-template-columns: repeat(2, 1fr); grid-template-areas: "one two" "three four" should set grid-template-rows	
 Fail	e.style.cssText = grid-template-rows: auto auto; grid-template-columns: repeat(auto-fill, 3px); grid-template-areas: "one two" "three four" should set grid	
-Fail	e.style.cssText = grid-template-rows: auto auto; grid-template-columns: repeat(auto-fill, 3px); grid-template-areas: "one two" "three four" should set grid-template-areas	
+Pass	e.style.cssText = grid-template-rows: auto auto; grid-template-columns: repeat(auto-fill, 3px); grid-template-areas: "one two" "three four" should set grid-template-areas	
 Fail	e.style.cssText = grid-template-rows: auto auto; grid-template-columns: repeat(auto-fill, 3px); grid-template-areas: "one two" "three four" should set grid-template-columns	
 Pass	e.style.cssText = grid-template-rows: auto auto; grid-template-columns: repeat(auto-fill, 3px); grid-template-areas: "one two" "three four" should set grid-template-rows	
 Fail	e.style.cssText = grid-template-rows: auto auto; grid-template-columns: repeat(auto-fit, 3px); grid-template-areas: "one two" "three four" should set grid	
-Fail	e.style.cssText = grid-template-rows: auto auto; grid-template-columns: repeat(auto-fit, 3px); grid-template-areas: "one two" "three four" should set grid-template-areas	
+Pass	e.style.cssText = grid-template-rows: auto auto; grid-template-columns: repeat(auto-fit, 3px); grid-template-areas: "one two" "three four" should set grid-template-areas	
 Fail	e.style.cssText = grid-template-rows: auto auto; grid-template-columns: repeat(auto-fit, 3px); grid-template-areas: "one two" "three four" should set grid-template-columns	
 Pass	e.style.cssText = grid-template-rows: auto auto; grid-template-columns: repeat(auto-fit, 3px); grid-template-areas: "one two" "three four" should set grid-template-rows	
\ 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 244054a5e56..9e837dc030a 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
@@ -6,8 +6,8 @@ Rerun
 
 Found 63 tests
 
-18 Pass
-45 Fail
+21 Pass
+42 Fail
 Details
 Result	Test Name	MessageFail	e.style['grid'] = "none" should set grid-auto-columns	
 Fail	e.style['grid'] = "none" should set grid-auto-flow	
@@ -40,21 +40,21 @@ Pass	e.style['grid'] = "fit-content(calc(-0.5em + 10px)) / fit-content(calc(0.5e
 Fail	e.style['grid'] = "[header-top] \"a a a\" [header-bottom] [main-top] \"b b b\" 1fr [main-bottom] / auto 1fr auto" should set grid-auto-columns	
 Fail	e.style['grid'] = "[header-top] \"a a a\" [header-bottom] [main-top] \"b b b\" 1fr [main-bottom] / auto 1fr auto" should set grid-auto-flow	
 Fail	e.style['grid'] = "[header-top] \"a a a\" [header-bottom] [main-top] \"b b b\" 1fr [main-bottom] / auto 1fr auto" should set grid-auto-rows	
-Fail	e.style['grid'] = "[header-top] \"a a a\" [header-bottom] [main-top] \"b b b\" 1fr [main-bottom] / auto 1fr auto" should set grid-template-areas	
+Pass	e.style['grid'] = "[header-top] \"a a a\" [header-bottom] [main-top] \"b b b\" 1fr [main-bottom] / auto 1fr auto" should set grid-template-areas	
 Pass	e.style['grid'] = "[header-top] \"a a a\" [header-bottom] [main-top] \"b b b\" 1fr [main-bottom] / auto 1fr auto" should set grid-template-columns	
 Fail	e.style['grid'] = "[header-top] \"a a a\" [header-bottom] [main-top] \"b b b\" 1fr [main-bottom] / auto 1fr auto" should set grid-template-rows	
 Pass	e.style['grid'] = "[header-top] \"a a a\" [header-bottom] [main-top] \"b b b\" 1fr [main-bottom] / auto 1fr auto" should not set unrelated longhands	
 Fail	e.style['grid'] = " \"a a a\" \"b b b\" 1fr/ auto 1fr auto" should set grid-auto-columns	
 Fail	e.style['grid'] = " \"a a a\" \"b b b\" 1fr/ auto 1fr auto" should set grid-auto-flow	
 Fail	e.style['grid'] = " \"a a a\" \"b b b\" 1fr/ auto 1fr auto" should set grid-auto-rows	
-Fail	e.style['grid'] = " \"a a a\" \"b b b\" 1fr/ auto 1fr auto" should set grid-template-areas	
+Pass	e.style['grid'] = " \"a a a\" \"b b b\" 1fr/ auto 1fr auto" should set grid-template-areas	
 Pass	e.style['grid'] = " \"a a a\" \"b b b\" 1fr/ auto 1fr auto" should set grid-template-columns	
 Fail	e.style['grid'] = " \"a a a\" \"b b b\" 1fr/ auto 1fr auto" should set grid-template-rows	
 Pass	e.style['grid'] = " \"a a a\" \"b b b\" 1fr/ auto 1fr auto" should not set unrelated longhands	
 Fail	e.style['grid'] = " [] \"a a a\" [] [] \"b b b\" 1fr [] / [] auto 1fr [] auto []" should set grid-auto-columns	
 Fail	e.style['grid'] = " [] \"a a a\" [] [] \"b b b\" 1fr [] / [] auto 1fr [] auto []" should set grid-auto-flow	
 Fail	e.style['grid'] = " [] \"a a a\" [] [] \"b b b\" 1fr [] / [] auto 1fr [] auto []" should set grid-auto-rows	
-Fail	e.style['grid'] = " [] \"a a a\" [] [] \"b b b\" 1fr [] / [] auto 1fr [] auto []" should set grid-template-areas	
+Pass	e.style['grid'] = " [] \"a a a\" [] [] \"b b b\" 1fr [] / [] auto 1fr [] auto []" should set grid-template-areas	
 Fail	e.style['grid'] = " [] \"a a a\" [] [] \"b b b\" 1fr [] / [] auto 1fr [] auto []" should set grid-template-columns	
 Fail	e.style['grid'] = " [] \"a a a\" [] [] \"b b b\" 1fr [] / [] auto 1fr [] auto []" should set grid-template-rows	
 Pass	e.style['grid'] = " [] \"a a a\" [] [] \"b b b\" 1fr [] / [] auto 1fr [] auto []" should not set unrelated longhands	
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-areas-computed.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-areas-computed.txt
index bc33dae34ee..da06f7e9487 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-areas-computed.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-areas-computed.txt
@@ -6,15 +6,14 @@ Rerun
 
 Found 9 tests
 
-1 Pass
-8 Fail
+9 Pass
 Details
 Result	Test Name	MessagePass	Property grid-template-areas value 'none'	
-Fail	Property grid-template-areas value '"first"'	
-Fail	Property grid-template-areas value '"first second"'	
-Fail	Property grid-template-areas value '"1st 2nd 3rd"'	
-Fail	Property grid-template-areas value '"first second" "third fourth"'	
-Fail	Property grid-template-areas value '"first second" "third ." "1st 2nd" "3rd 4th"'	
-Fail	Property grid-template-areas value '" a b "'	
-Fail	Property grid-template-areas value '"c d"'	
-Fail	Property grid-template-areas value '"first ..."'	
\ No newline at end of file
+Pass	Property grid-template-areas value '"first"'	
+Pass	Property grid-template-areas value '"first second"'	
+Pass	Property grid-template-areas value '"1st 2nd 3rd"'	
+Pass	Property grid-template-areas value '"first second" "third fourth"'	
+Pass	Property grid-template-areas value '"first second" "third ." "1st 2nd" "3rd 4th"'	
+Pass	Property grid-template-areas value '" a b "'	
+Pass	Property grid-template-areas value '"c d"'	
+Pass	Property grid-template-areas value '"first ..."'	
\ No newline at end of file
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-areas-invalid.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-areas-invalid.txt
index 712731830d8..c8c2ff0766a 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-areas-invalid.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-areas-invalid.txt
@@ -6,17 +6,16 @@ Rerun
 
 Found 11 tests
 
-6 Pass
-5 Fail
+11 Pass
 Details
 Result	Test Name	MessagePass	e.style['grid-template-areas'] = "auto" should not set the property value	
 Pass	e.style['grid-template-areas'] = "none \"first\"" should not set the property value	
 Pass	e.style['grid-template-areas'] = "\"first\" none" should not set the property value	
 Pass	e.style['grid-template-areas'] = "\"\"" should not set the property value	
 Pass	e.style['grid-template-areas'] = "\" \"" should not set the property value	
-Fail	e.style['grid-template-areas'] = "\".\" \"\"" should not set the property value	
-Fail	e.style['grid-template-areas'] = "\".\" \" \"" should not set the property value	
-Fail	e.style['grid-template-areas'] = "\"first\" \"\"" should not set the property value	
-Fail	e.style['grid-template-areas'] = "\"first\" \"\" \"second\"" should not set the property value	
-Fail	e.style['grid-template-areas'] = "\"first\" \" \"" should not set the property value	
+Pass	e.style['grid-template-areas'] = "\".\" \"\"" should not set the property value	
+Pass	e.style['grid-template-areas'] = "\".\" \" \"" should not set the property value	
+Pass	e.style['grid-template-areas'] = "\"first\" \"\"" should not set the property value	
+Pass	e.style['grid-template-areas'] = "\"first\" \"\" \"second\"" should not set the property value	
+Pass	e.style['grid-template-areas'] = "\"first\" \" \"" should not set the property value	
 Pass	e.style['grid-template-areas'] = "\"\" none" should not set the property value	
\ No newline at end of file
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-areas-one-cell.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-areas-one-cell.txt
index 1b94117a6e2..171f45f77f1 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-areas-one-cell.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-areas-one-cell.txt
@@ -6,12 +6,11 @@ Rerun
 
 Found 6 tests
 
-4 Pass
-2 Fail
+6 Pass
 Details
 Result	Test Name	MessagePass	"grid-template-areas: 'a';" should be valid.	
 Pass	"grid-template-areas: '.';" should be valid.	
 Pass	"grid-template-areas: '';" should be invalid.	
-Fail	"grid-template-areas: '' '';" should be invalid.	
-Fail	"grid-template-areas: '$';" should be invalid.	
+Pass	"grid-template-areas: '' '';" should be invalid.	
+Pass	"grid-template-areas: '$';" should be invalid.	
 Pass	"grid-template-areas: ' ';" should be invalid.	
\ No newline at end of file
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-areas-valid.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-areas-valid.txt
index 64240754036..121a67811b3 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-areas-valid.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-grid/parsing/grid-template-areas-valid.txt
@@ -6,15 +6,14 @@ Rerun
 
 Found 9 tests
 
-1 Pass
-8 Fail
+9 Pass
 Details
 Result	Test Name	MessagePass	e.style['grid-template-areas'] = "none" should set the property value	
-Fail	e.style['grid-template-areas'] = "\"first\"" should set the property value	
-Fail	e.style['grid-template-areas'] = "\"first second\"" should set the property value	
-Fail	e.style['grid-template-areas'] = "\"1st 2nd 3rd\"" should set the property value	
-Fail	e.style['grid-template-areas'] = "\"first second\" \"third fourth\"" should set the property value	
-Fail	e.style['grid-template-areas'] = "\"first second\" \"third .\" \"1st 2nd\" \"3rd 4th\"" should set the property value	
-Fail	e.style['grid-template-areas'] = "\" a \t b \"" should set the property value	
-Fail	e.style['grid-template-areas'] = "\"c\td\"" should set the property value	
-Fail	e.style['grid-template-areas'] = "\"first ...\"" should set the property value	
\ No newline at end of file
+Pass	e.style['grid-template-areas'] = "\"first\"" should set the property value	
+Pass	e.style['grid-template-areas'] = "\"first second\"" should set the property value	
+Pass	e.style['grid-template-areas'] = "\"1st 2nd 3rd\"" should set the property value	
+Pass	e.style['grid-template-areas'] = "\"first second\" \"third fourth\"" should set the property value	
+Pass	e.style['grid-template-areas'] = "\"first second\" \"third .\" \"1st 2nd\" \"3rd 4th\"" should set the property value	
+Pass	e.style['grid-template-areas'] = "\" a \t b \"" should set the property value	
+Pass	e.style['grid-template-areas'] = "\"c\td\"" should set the property value	
+Pass	e.style['grid-template-areas'] = "\"first ...\"" should set the property value	
\ No newline at end of file
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 96f5e9283bc..0ae2c86917b 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
@@ -6,8 +6,8 @@ Rerun
 
 Found 24 tests
 
-15 Pass
-9 Fail
+18 Pass
+6 Fail
 Details
 Result	Test Name	MessagePass	e.style['grid-template'] = "none" should set grid-template-areas	
 Fail	e.style['grid-template'] = "none" should set grid-template-columns	
@@ -21,15 +21,15 @@ Pass	e.style['grid-template'] = "fit-content(calc(-0.5em + 10px)) / fit-content(
 Pass	e.style['grid-template'] = "fit-content(calc(-0.5em + 10px)) / fit-content(calc(0.5em + 10px))" should set grid-template-columns	
 Pass	e.style['grid-template'] = "fit-content(calc(-0.5em + 10px)) / fit-content(calc(0.5em + 10px))" should set grid-template-rows	
 Pass	e.style['grid-template'] = "fit-content(calc(-0.5em + 10px)) / fit-content(calc(0.5em + 10px))" should not set unrelated longhands	
-Fail	e.style['grid-template'] = "[header-top] \"a a a\" [header-bottom] [main-top] \"b b b\" 1fr [main-bottom] / auto 1fr auto" should set grid-template-areas	
+Pass	e.style['grid-template'] = "[header-top] \"a a a\" [header-bottom] [main-top] \"b b b\" 1fr [main-bottom] / auto 1fr auto" should set grid-template-areas	
 Pass	e.style['grid-template'] = "[header-top] \"a a a\" [header-bottom] [main-top] \"b b b\" 1fr [main-bottom] / auto 1fr auto" should set grid-template-columns	
 Fail	e.style['grid-template'] = "[header-top] \"a a a\" [header-bottom] [main-top] \"b b b\" 1fr [main-bottom] / auto 1fr auto" should set grid-template-rows	
 Pass	e.style['grid-template'] = "[header-top] \"a a a\" [header-bottom] [main-top] \"b b b\" 1fr [main-bottom] / auto 1fr auto" should not set unrelated longhands	
-Fail	e.style['grid-template'] = " \"a a a\" \"b b b\" 1fr/ auto 1fr auto" should set grid-template-areas	
+Pass	e.style['grid-template'] = " \"a a a\" \"b b b\" 1fr/ auto 1fr auto" should set grid-template-areas	
 Pass	e.style['grid-template'] = " \"a a a\" \"b b b\" 1fr/ auto 1fr auto" should set grid-template-columns	
 Fail	e.style['grid-template'] = " \"a a a\" \"b b b\" 1fr/ auto 1fr auto" should set grid-template-rows	
 Pass	e.style['grid-template'] = " \"a a a\" \"b b b\" 1fr/ auto 1fr auto" should not set unrelated longhands	
-Fail	e.style['grid-template'] = " [] \"a a a\" [] [] \"b b b\" 1fr [] / [] auto 1fr [] auto []" should set grid-template-areas	
+Pass	e.style['grid-template'] = " [] \"a a a\" [] [] \"b b b\" 1fr [] / [] auto 1fr [] auto []" should set grid-template-areas	
 Fail	e.style['grid-template'] = " [] \"a a a\" [] [] \"b b b\" 1fr [] / [] auto 1fr [] auto []" should set grid-template-columns	
 Fail	e.style['grid-template'] = " [] \"a a a\" [] [] \"b b b\" 1fr [] / [] auto 1fr [] auto []" should set grid-template-rows	
 Pass	e.style['grid-template'] = " [] \"a a a\" [] [] \"b b b\" 1fr [] / [] auto 1fr [] auto []" should not set unrelated longhands	
\ No newline at end of file
diff --git a/Tests/LibWeb/Text/input/wpt-import/css/css-grid/grid-definition/grid-support-grid-template-areas-001.html b/Tests/LibWeb/Text/input/wpt-import/css/css-grid/grid-definition/grid-support-grid-template-areas-001.html
new file mode 100644
index 00000000000..82ecaf89ad1
--- /dev/null
+++ b/Tests/LibWeb/Text/input/wpt-import/css/css-grid/grid-definition/grid-support-grid-template-areas-001.html
@@ -0,0 +1,72 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Grid Layout Test: Support for 'grid-template-ares' property</title>
+<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
+<link rel="help" href="http://www.w3.org/TR/css-grid-1/#grid-template-areas-property" title="5.2 Named Areas: the 'grid-template-areas' property">
+<meta name="flags" content="ahem dom">
+<meta name="assert" content="This test checks that 'grid-template-areas' is supported in a grid. So you can define the grid structure.">
+<script src="../../../resources/testharness.js"></script>
+<script src="../../../resources/testharnessreport.js"></script>
+<script src="support/testing-utils.js"></script>
+<style>
+  #grid {
+    display: grid;
+  }
+</style>
+<div id="log"></div>
+
+<div id="grid"></div>
+
+<script>
+  // Single values.
+  TestingUtils.testGridTemplateAreas('grid', 'none', 'none');
+  TestingUtils.testGridTemplateAreas('grid', '"a"', '"a"');
+  TestingUtils.testGridTemplateAreas('grid', '"."', '"."');
+  TestingUtils.testGridTemplateAreas('grid', '"lower UPPER 10 -minus _low 1-st ©copy_right line¶"', '"lower UPPER 10 -minus _low 1-st ©copy_right line¶"');
+  TestingUtils.testGridTemplateAreas('grid', '"a b"', '"a b"');
+  TestingUtils.testGridTemplateAreas('grid', '"a b" "c d"', '"a b" "c d"');
+  TestingUtils.testGridTemplateAreas('grid', '"a   b"   "c   d"', '"a b" "c d"');
+  TestingUtils.testGridTemplateAreas('grid', '"a b""c d"', '"a b" "c d"');
+  TestingUtils.testGridTemplateAreas('grid', '"a b"\t"c d"', '"a b" "c d"');
+  TestingUtils.testGridTemplateAreas('grid', '"a b"\n"c d"', '"a b" "c d"');
+  TestingUtils.testGridTemplateAreas('grid', '"a b" "a b"', '"a b" "a b"');
+  TestingUtils.testGridTemplateAreas('grid', '"a a" "b b"', '"a a" "b b"');
+  TestingUtils.testGridTemplateAreas('grid', '". a ." "b a c"', '". a ." "b a c"');
+  TestingUtils.testGridTemplateAreas('grid', '".. a ..." "b a c"', '". a ." "b a c"');
+  TestingUtils.testGridTemplateAreas('grid', '".a..." "b a c"', '". a ." "b a c"');
+  TestingUtils.testGridTemplateAreas('grid', '"head head" "nav main" "foot ."', '"head head" "nav main" "foot ."');
+  TestingUtils.testGridTemplateAreas('grid', '"head head" "nav main" "foot ...."', '"head head" "nav main" "foot ."');
+  TestingUtils.testGridTemplateAreas('grid', '"head head" "nav main" "foot."', '"head head" "nav main" "foot ."');
+  TestingUtils.testGridTemplateAreas('grid', '". header header ." "nav main main main" "nav footer footer ."', '". header header ." "nav main main main" "nav footer footer ."');
+  TestingUtils.testGridTemplateAreas('grid', '"... header header ...." "nav main main main" "nav footer footer ...."', '". header header ." "nav main main main" "nav footer footer ."');
+  TestingUtils.testGridTemplateAreas('grid', '"...header header...." "nav main main main" "nav footer footer...."', '". header header ." "nav main main main" "nav footer footer ."');
+  TestingUtils.testGridTemplateAreas('grid', '"title stats" "score stats" "board board" "ctrls ctrls"', '"title stats" "score stats" "board board" "ctrls ctrls"');
+  TestingUtils.testGridTemplateAreas('grid', '"title board" "stats board" "score ctrls"', '"title board" "stats board" "score ctrls"');
+  TestingUtils.testGridTemplateAreas('grid', '". a" "b a" ". a"', '". a" "b a" ". a"');
+  TestingUtils.testGridTemplateAreas('grid', '".. a" "b a" "... a"', '". a" "b a" ". a"');
+  TestingUtils.testGridTemplateAreas('grid', '"..a" "b a" ".a"', '". a" "b a" ". a"');
+  TestingUtils.testGridTemplateAreas('grid', '"a a a" "b b b"', '"a a a" "b b b"');
+  TestingUtils.testGridTemplateAreas('grid', '". ." "a a"', '". ." "a a"');
+  TestingUtils.testGridTemplateAreas('grid', '"... ...." "a a"', '". ." "a a"');
+
+  // Reset values.
+  document.getElementById('grid').style.gridTemplateAreas = '';
+
+  // Wrong values.
+  TestingUtils.testGridTemplateAreas('grid', 'a', 'none');
+  TestingUtils.testGridTemplateAreas('grid', '"a" "b c"', 'none');
+  TestingUtils.testGridTemplateAreas('grid', '"a b" "c" "d e"', 'none');
+  TestingUtils.testGridTemplateAreas('grid', '"a b c" "d e"', 'none');
+  TestingUtils.testGridTemplateAreas('grid', '"a b"-"c d"', 'none');
+  TestingUtils.testGridTemplateAreas('grid', '"a b" - "c d"', 'none');
+  TestingUtils.testGridTemplateAreas('grid', '"a b" . "c d"', 'none');
+  TestingUtils.testGridTemplateAreas('grid', '"a b a"', 'none');
+  TestingUtils.testGridTemplateAreas('grid', '"a" "b" "a"', 'none');
+  TestingUtils.testGridTemplateAreas('grid', '"a b" "b b"', 'none');
+  TestingUtils.testGridTemplateAreas('grid', '"b a" "b b"', 'none');
+  TestingUtils.testGridTemplateAreas('grid', '"a b" "b a"', 'none');
+  TestingUtils.testGridTemplateAreas('grid', '"a ." ". a"', 'none');
+  TestingUtils.testGridTemplateAreas('grid', '","', 'none');
+  TestingUtils.testGridTemplateAreas('grid', '"10%"', 'none');
+  TestingUtils.testGridTemplateAreas('grid', '"USD$"', 'none');
+</script>
diff --git a/Tests/LibWeb/Text/input/wpt-import/css/css-grid/grid-definition/support/testing-utils.js b/Tests/LibWeb/Text/input/wpt-import/css/css-grid/grid-definition/support/testing-utils.js
new file mode 100644
index 00000000000..30b944265b4
--- /dev/null
+++ b/Tests/LibWeb/Text/input/wpt-import/css/css-grid/grid-definition/support/testing-utils.js
@@ -0,0 +1,43 @@
+var TestingUtils = (function() {
+
+    function checkGridTemplateColumns(element, value) {
+        if (!Array.isArray(value))
+            value = new Array(value);
+        assert_in_array(getComputedStyle(element).gridTemplateColumns, value, "gridTemplateColumns");
+    }
+
+    function checkGridTemplateRows(element, value) {
+        if (!Array.isArray(value))
+            value = new Array(value);
+        assert_in_array(getComputedStyle(element).gridTemplateRows, value, "gridTemplateRows");
+    }
+
+    function testGridTemplateColumnsRows(gridId, columnsStyle, rowsStyle, columnsComputedValue, rowsComputedValue, label) {
+        test(function() {
+            var grid = document.getElementById(gridId);
+            grid.style.gridTemplateColumns = columnsStyle;
+            grid.style.gridTemplateRows = rowsStyle;
+            checkGridTemplateColumns(grid, columnsComputedValue);
+            checkGridTemplateRows(grid, rowsComputedValue);
+        }, (label ? label + " " : "") + "'" + gridId + "' with: grid-template-columns: " + columnsStyle  + "; and grid-template-rows: " + rowsStyle + ";");
+    }
+
+    function checkGridTemplateAreas(element, value) {
+        if (!Array.isArray(value))
+            value = new Array(value);
+        assert_in_array(getComputedStyle(element).gridTemplateAreas, value, "gridTemplateAreas");
+    }
+
+    function testGridTemplateAreas(gridId, style, value) {
+        test(function() {
+            var grid = document.getElementById(gridId);
+            grid.style.gridTemplateAreas = style;
+            checkGridTemplateAreas(grid, value);
+        }, "'" + gridId + "' with: grid-template-areas: " + style + ";");
+    }
+
+    return {
+        testGridTemplateColumnsRows: testGridTemplateColumnsRows,
+        testGridTemplateAreas: testGridTemplateAreas
+    }
+})();