diff --git a/boa_engine/src/builtins/number/tests.rs b/boa_engine/src/builtins/number/tests.rs
index be2b7f63ec4..84aed8fbe9c 100644
--- a/boa_engine/src/builtins/number/tests.rs
+++ b/boa_engine/src/builtins/number/tests.rs
@@ -41,6 +41,107 @@ fn to_fixed() {
         TestAction::assert_eq("Number('3.456e-4').toFixed()", "0"),
         TestAction::assert_eq("Number(5).toFixed()", "5"),
         TestAction::assert_eq("Number('I am also not a number').toFixed()", "NaN"),
+        TestAction::assert_eq("(1.35).toFixed(1)", "1.4"),
+        // Test cases from https://source.chromium.org/chromium/chromium/src/+/main:v8/test/mjsunit/number-tostring-func.js;l=157-240;drc=aa3518a0f37245ebe8f062dce97ee492e2a41652
+        TestAction::assert_eq("(NaN).toFixed(2)", "NaN"),
+        TestAction::assert_eq("(1/0).toFixed(2)", "Infinity"),
+        TestAction::assert_eq("(-1/0).toFixed(2)", "-Infinity"),
+        TestAction::assert_eq(
+            "(1111111111111111111111).toFixed(8)",
+            "1.1111111111111111e+21",
+        ),
+        TestAction::assert_eq("(0.1).toFixed(1)", "0.1"),
+        TestAction::assert_eq("(0.1).toFixed(2)", "0.10"),
+        TestAction::assert_eq("(0.1).toFixed(3)", "0.100"),
+        TestAction::assert_eq("(0.01).toFixed(2)", "0.01"),
+        TestAction::assert_eq("(0.01).toFixed(3)", "0.010"),
+        TestAction::assert_eq("(0.01).toFixed(4)", "0.0100"),
+        TestAction::assert_eq("(0.001).toFixed(2)", "0.00"),
+        TestAction::assert_eq("(0.001).toFixed(3)", "0.001"),
+        TestAction::assert_eq("(0.001).toFixed(4)", "0.0010"),
+        TestAction::assert_eq("(1).toFixed(4)", "1.0000"),
+        TestAction::assert_eq("(1).toFixed(1)", "1.0"),
+        TestAction::assert_eq("(1).toFixed(0)", "1"),
+        TestAction::assert_eq("(12).toFixed(0)", "12"),
+        TestAction::assert_eq("(1.1).toFixed(0)", "1"),
+        TestAction::assert_eq("(12.1).toFixed(0)", "12"),
+        TestAction::assert_eq("(1.12).toFixed(0)", "1"),
+        TestAction::assert_eq("(12.12).toFixed(0)", "12"),
+        TestAction::assert_eq("(0.0000006).toFixed(7)", "0.0000006"),
+        TestAction::assert_eq("(0.00000006).toFixed(8)", "0.00000006"),
+        TestAction::assert_eq("(0.00000006).toFixed(9)", "0.000000060"),
+        TestAction::assert_eq("(0.00000006).toFixed(10)", "0.0000000600"),
+        TestAction::assert_eq("(0).toFixed(0)", "0"),
+        TestAction::assert_eq("(0).toFixed(1)", "0.0"),
+        TestAction::assert_eq("(0).toFixed(2)", "0.00"),
+        TestAction::assert_eq(
+            "(-1111111111111111111111).toFixed(8)",
+            "-1.1111111111111111e+21",
+        ),
+        TestAction::assert_eq("(-0.1).toFixed(1)", "-0.1"),
+        TestAction::assert_eq("(-0.1).toFixed(2)", "-0.10"),
+        TestAction::assert_eq("(-0.1).toFixed(3)", "-0.100"),
+        TestAction::assert_eq("(-0.01).toFixed(2)", "-0.01"),
+        TestAction::assert_eq("(-0.01).toFixed(3)", "-0.010"),
+        TestAction::assert_eq("(-0.01).toFixed(4)", "-0.0100"),
+        TestAction::assert_eq("(-0.001).toFixed(2)", "-0.00"),
+        TestAction::assert_eq("(-0.001).toFixed(3)", "-0.001"),
+        TestAction::assert_eq("(-0.001).toFixed(4)", "-0.0010"),
+        TestAction::assert_eq("(-1).toFixed(4)", "-1.0000"),
+        TestAction::assert_eq("(-1).toFixed(1)", "-1.0"),
+        TestAction::assert_eq("(-1).toFixed(0)", "-1"),
+        TestAction::assert_eq("(-1.1).toFixed(0)", "-1"),
+        TestAction::assert_eq("(-12.1).toFixed(0)", "-12"),
+        TestAction::assert_eq("(-1.12).toFixed(0)", "-1"),
+        TestAction::assert_eq("(-12.12).toFixed(0)", "-12"),
+        TestAction::assert_eq("(-0.0000006).toFixed(7)", "-0.0000006"),
+        TestAction::assert_eq("(-0.00000006).toFixed(8)", "-0.00000006"),
+        TestAction::assert_eq("(-0.00000006).toFixed(9)", "-0.000000060"),
+        TestAction::assert_eq("(-0.00000006).toFixed(10)", "-0.0000000600"),
+        TestAction::assert_eq("(-0).toFixed(0)", "0"),
+        TestAction::assert_eq("(-0).toFixed(1)", "0.0"),
+        TestAction::assert_eq("(-0).toFixed(2)", "0.00"),
+        TestAction::assert_eq("(0.00001).toFixed(5)", "0.00001"),
+        TestAction::assert_eq(
+            "(0.0000000000000000001).toFixed(20)",
+            "0.00000000000000000010",
+        ),
+        TestAction::assert_eq("(0.00001).toFixed(17)", "0.00001000000000000"),
+        TestAction::assert_eq("(1).toFixed(17)", "1.00000000000000000"),
+        TestAction::assert_eq("(100000000000000128).toFixed(1)", "100000000000000128.0"),
+        TestAction::assert_eq("(10000000000000128).toFixed(2)", "10000000000000128.00"),
+        TestAction::assert_eq(
+            "(10000000000000128).toFixed(20)",
+            "10000000000000128.00000000000000000000",
+        ),
+        TestAction::assert_eq("(-42).toFixed(3)", "-42.000"),
+        TestAction::assert_eq(
+            "(-0.0000000000000000001).toFixed(20)",
+            "-0.00000000000000000010",
+        ),
+        TestAction::assert_eq("(0.123123123123123).toFixed(20)", "0.12312312312312299889"),
+        TestAction::assert_eq("(-1000000000000000128).toFixed()", "-1000000000000000128"),
+        TestAction::assert_eq("(0).toFixed()", "0"),
+        TestAction::assert_eq("(1000000000000000128).toFixed()", "1000000000000000128"),
+        TestAction::assert_eq("(1000).toFixed()", "1000"),
+        TestAction::assert_eq("(0.00001).toFixed()", "0"),
+        // Test that we round up even when the last digit generated is even.
+        // dtoa does not do this in its original form.
+        TestAction::assert_eq("(0.5).toFixed(0)", "1"),
+        TestAction::assert_eq("(-0.5).toFixed(0)", "-1"),
+        TestAction::assert_eq("(1.25).toFixed(1)", "1.3"),
+        // This is bizare, but Spidermonkey and KJS behave the same.
+        TestAction::assert_eq("(234.2040).toFixed(4)", "234.2040"),
+        TestAction::assert_eq("(234.2040506).toFixed(4)", "234.2041"),
+    ]);
+}
+
+// https://github.com/boa-dev/boa/issues/2609
+#[test]
+fn issue_2609() {
+    run_test_actions([
+        TestAction::assert_eq("(1.25).toFixed(1)", "1.3"),
+        TestAction::assert_eq("(1.35).toFixed(1)", "1.4"),
     ]);
 }
 
@@ -479,12 +580,3 @@ fn issue_2717() {
         TestAction::assert_eq("(0.23046743672210102).toString(36)", "0.8aoosla2phj"),
     ]);
 }
-
-// https://github.com/boa-dev/boa/issues/2609
-#[test]
-fn issue_2609() {
-    run_test_actions([
-        TestAction::assert_eq("(1.25).toFixed(1)", "1.3"),
-        TestAction::assert_eq("(1.35).toFixed(1)", "1.4"),
-    ]);
-}