diff --git a/Tests/LibWeb/Text/expected/wpt-import/trusted-types/TrustedTypePolicy-CSP-no-name.txt b/Tests/LibWeb/Text/expected/wpt-import/trusted-types/TrustedTypePolicy-CSP-no-name.txt
new file mode 100644
index 00000000000..9c317281995
--- /dev/null
+++ b/Tests/LibWeb/Text/expected/wpt-import/trusted-types/TrustedTypePolicy-CSP-no-name.txt
@@ -0,0 +1,6 @@
+Harness status: OK
+
+Found 1 tests
+
+1 Pass
+Pass	No name list given - policy creation fails.
\ No newline at end of file
diff --git a/Tests/LibWeb/Text/expected/wpt-import/trusted-types/TrustedTypePolicy-CSP-wildcard.txt b/Tests/LibWeb/Text/expected/wpt-import/trusted-types/TrustedTypePolicy-CSP-wildcard.txt
new file mode 100644
index 00000000000..071debc88b1
--- /dev/null
+++ b/Tests/LibWeb/Text/expected/wpt-import/trusted-types/TrustedTypePolicy-CSP-wildcard.txt
@@ -0,0 +1,6 @@
+Harness status: OK
+
+Found 1 tests
+
+1 Pass
+Pass	CSP supports wildcards.
\ No newline at end of file
diff --git a/Tests/LibWeb/Text/expected/wpt-import/trusted-types/TrustedTypePolicyFactory-constants.txt b/Tests/LibWeb/Text/expected/wpt-import/trusted-types/TrustedTypePolicyFactory-constants.txt
new file mode 100644
index 00000000000..765e3f251a2
--- /dev/null
+++ b/Tests/LibWeb/Text/expected/wpt-import/trusted-types/TrustedTypePolicyFactory-constants.txt
@@ -0,0 +1,11 @@
+Harness status: OK
+
+Found 6 tests
+
+6 Pass
+Pass	trustedTypes.emptyHTML returns the intended value.
+Pass	trustedTypes.emptyHTML cannot be redefined.
+Pass	trustedTypes.emptyHTML cannot be redefined via defineProperty.
+Pass	trustedTypes.emptyScript returns the intended value.
+Pass	trustedTypes.emptyScript cannot be redefined.
+Pass	trustedTypes.emptyScript cannot be redefined via defineProperty.
\ No newline at end of file
diff --git a/Tests/LibWeb/Text/expected/wpt-import/trusted-types/idlharness.window.txt b/Tests/LibWeb/Text/expected/wpt-import/trusted-types/idlharness.window.txt
new file mode 100644
index 00000000000..70b0a0c6b50
--- /dev/null
+++ b/Tests/LibWeb/Text/expected/wpt-import/trusted-types/idlharness.window.txt
@@ -0,0 +1,105 @@
+Harness status: OK
+
+Found 100 tests
+
+100 Pass
+Pass	idl_test setup
+Pass	idl_test validation
+Pass	Partial interface mixin WindowOrWorkerGlobalScope: original interface mixin defined
+Pass	Partial interface mixin WindowOrWorkerGlobalScope: member names are unique
+Pass	Partial interface Window: member names are unique
+Pass	Window includes GlobalEventHandlers: member names are unique
+Pass	Window includes WindowEventHandlers: member names are unique
+Pass	Window includes WindowOrWorkerGlobalScope: member names are unique
+Pass	WorkerGlobalScope includes WindowOrWorkerGlobalScope: member names are unique
+Pass	Window includes AnimationFrameProvider: member names are unique
+Pass	Window includes WindowSessionStorage: member names are unique
+Pass	Window includes WindowLocalStorage: member names are unique
+Pass	TrustedHTML interface: existence and properties of interface object
+Pass	TrustedHTML interface object length
+Pass	TrustedHTML interface object name
+Pass	TrustedHTML interface: existence and properties of interface prototype object
+Pass	TrustedHTML interface: existence and properties of interface prototype object's "constructor" property
+Pass	TrustedHTML interface: existence and properties of interface prototype object's @@unscopables property
+Pass	TrustedHTML interface: stringifier
+Pass	TrustedHTML interface: operation toJSON()
+Pass	TrustedHTML must be primary interface of window.trustedTypes.createPolicy("SomeName1", { createHTML: s => s }).createHTML("A string")
+Pass	Stringification of window.trustedTypes.createPolicy("SomeName1", { createHTML: s => s }).createHTML("A string")
+Pass	TrustedHTML interface: window.trustedTypes.createPolicy("SomeName1", { createHTML: s => s }).createHTML("A string") must inherit property "toJSON()" with the proper type
+Pass	TrustedHTML interface: toJSON operation on window.trustedTypes.createPolicy("SomeName1", { createHTML: s => s }).createHTML("A string")
+Pass	TrustedScript interface: existence and properties of interface object
+Pass	TrustedScript interface object length
+Pass	TrustedScript interface object name
+Pass	TrustedScript interface: existence and properties of interface prototype object
+Pass	TrustedScript interface: existence and properties of interface prototype object's "constructor" property
+Pass	TrustedScript interface: existence and properties of interface prototype object's @@unscopables property
+Pass	TrustedScript interface: stringifier
+Pass	TrustedScript interface: operation toJSON()
+Pass	TrustedScript must be primary interface of window.trustedTypes.createPolicy("SomeName2", { createScript: s => s }).createScript("A string")
+Pass	Stringification of window.trustedTypes.createPolicy("SomeName2", { createScript: s => s }).createScript("A string")
+Pass	TrustedScript interface: window.trustedTypes.createPolicy("SomeName2", { createScript: s => s }).createScript("A string") must inherit property "toJSON()" with the proper type
+Pass	TrustedScript interface: toJSON operation on window.trustedTypes.createPolicy("SomeName2", { createScript: s => s }).createScript("A string")
+Pass	TrustedScriptURL interface: existence and properties of interface object
+Pass	TrustedScriptURL interface object length
+Pass	TrustedScriptURL interface object name
+Pass	TrustedScriptURL interface: existence and properties of interface prototype object
+Pass	TrustedScriptURL interface: existence and properties of interface prototype object's "constructor" property
+Pass	TrustedScriptURL interface: existence and properties of interface prototype object's @@unscopables property
+Pass	TrustedScriptURL interface: stringifier
+Pass	TrustedScriptURL interface: operation toJSON()
+Pass	TrustedScriptURL must be primary interface of window.trustedTypes.createPolicy("SomeName3", { createScriptURL: s => s }).createScriptURL("A string")
+Pass	Stringification of window.trustedTypes.createPolicy("SomeName3", { createScriptURL: s => s }).createScriptURL("A string")
+Pass	TrustedScriptURL interface: window.trustedTypes.createPolicy("SomeName3", { createScriptURL: s => s }).createScriptURL("A string") must inherit property "toJSON()" with the proper type
+Pass	TrustedScriptURL interface: toJSON operation on window.trustedTypes.createPolicy("SomeName3", { createScriptURL: s => s }).createScriptURL("A string")
+Pass	TrustedTypePolicyFactory interface: existence and properties of interface object
+Pass	TrustedTypePolicyFactory interface object length
+Pass	TrustedTypePolicyFactory interface object name
+Pass	TrustedTypePolicyFactory interface: existence and properties of interface prototype object
+Pass	TrustedTypePolicyFactory interface: existence and properties of interface prototype object's "constructor" property
+Pass	TrustedTypePolicyFactory interface: existence and properties of interface prototype object's @@unscopables property
+Pass	TrustedTypePolicyFactory interface: operation createPolicy(DOMString, optional TrustedTypePolicyOptions)
+Pass	TrustedTypePolicyFactory interface: operation isHTML(any)
+Pass	TrustedTypePolicyFactory interface: operation isScript(any)
+Pass	TrustedTypePolicyFactory interface: operation isScriptURL(any)
+Pass	TrustedTypePolicyFactory interface: attribute emptyHTML
+Pass	TrustedTypePolicyFactory interface: attribute emptyScript
+Pass	TrustedTypePolicyFactory interface: operation getAttributeType(DOMString, DOMString, optional DOMString?, optional DOMString?)
+Pass	TrustedTypePolicyFactory interface: operation getPropertyType(DOMString, DOMString, optional DOMString?)
+Pass	TrustedTypePolicyFactory interface: attribute defaultPolicy
+Pass	TrustedTypePolicyFactory must be primary interface of window.trustedTypes
+Pass	Stringification of window.trustedTypes
+Pass	TrustedTypePolicyFactory interface: window.trustedTypes must inherit property "createPolicy(DOMString, optional TrustedTypePolicyOptions)" with the proper type
+Pass	TrustedTypePolicyFactory interface: calling createPolicy(DOMString, optional TrustedTypePolicyOptions) on window.trustedTypes with too few arguments must throw TypeError
+Pass	TrustedTypePolicyFactory interface: window.trustedTypes must inherit property "isHTML(any)" with the proper type
+Pass	TrustedTypePolicyFactory interface: calling isHTML(any) on window.trustedTypes with too few arguments must throw TypeError
+Pass	TrustedTypePolicyFactory interface: window.trustedTypes must inherit property "isScript(any)" with the proper type
+Pass	TrustedTypePolicyFactory interface: calling isScript(any) on window.trustedTypes with too few arguments must throw TypeError
+Pass	TrustedTypePolicyFactory interface: window.trustedTypes must inherit property "isScriptURL(any)" with the proper type
+Pass	TrustedTypePolicyFactory interface: calling isScriptURL(any) on window.trustedTypes with too few arguments must throw TypeError
+Pass	TrustedTypePolicyFactory interface: window.trustedTypes must inherit property "emptyHTML" with the proper type
+Pass	TrustedTypePolicyFactory interface: window.trustedTypes must inherit property "emptyScript" with the proper type
+Pass	TrustedTypePolicyFactory interface: window.trustedTypes must inherit property "getAttributeType(DOMString, DOMString, optional DOMString?, optional DOMString?)" with the proper type
+Pass	TrustedTypePolicyFactory interface: calling getAttributeType(DOMString, DOMString, optional DOMString?, optional DOMString?) on window.trustedTypes with too few arguments must throw TypeError
+Pass	TrustedTypePolicyFactory interface: window.trustedTypes must inherit property "getPropertyType(DOMString, DOMString, optional DOMString?)" with the proper type
+Pass	TrustedTypePolicyFactory interface: calling getPropertyType(DOMString, DOMString, optional DOMString?) on window.trustedTypes with too few arguments must throw TypeError
+Pass	TrustedTypePolicyFactory interface: window.trustedTypes must inherit property "defaultPolicy" with the proper type
+Pass	TrustedTypePolicy interface: existence and properties of interface object
+Pass	TrustedTypePolicy interface object length
+Pass	TrustedTypePolicy interface object name
+Pass	TrustedTypePolicy interface: existence and properties of interface prototype object
+Pass	TrustedTypePolicy interface: existence and properties of interface prototype object's "constructor" property
+Pass	TrustedTypePolicy interface: existence and properties of interface prototype object's @@unscopables property
+Pass	TrustedTypePolicy interface: attribute name
+Pass	TrustedTypePolicy interface: operation createHTML(DOMString, any...)
+Pass	TrustedTypePolicy interface: operation createScript(DOMString, any...)
+Pass	TrustedTypePolicy interface: operation createScriptURL(DOMString, any...)
+Pass	TrustedTypePolicy must be primary interface of window.trustedTypes.createPolicy("SomeName", { createHTML: s => s })
+Pass	Stringification of window.trustedTypes.createPolicy("SomeName", { createHTML: s => s })
+Pass	TrustedTypePolicy interface: window.trustedTypes.createPolicy("SomeName", { createHTML: s => s }) must inherit property "name" with the proper type
+Pass	TrustedTypePolicy interface: window.trustedTypes.createPolicy("SomeName", { createHTML: s => s }) must inherit property "createHTML(DOMString, any...)" with the proper type
+Pass	TrustedTypePolicy interface: calling createHTML(DOMString, any...) on window.trustedTypes.createPolicy("SomeName", { createHTML: s => s }) with too few arguments must throw TypeError
+Pass	TrustedTypePolicy interface: window.trustedTypes.createPolicy("SomeName", { createHTML: s => s }) must inherit property "createScript(DOMString, any...)" with the proper type
+Pass	TrustedTypePolicy interface: calling createScript(DOMString, any...) on window.trustedTypes.createPolicy("SomeName", { createHTML: s => s }) with too few arguments must throw TypeError
+Pass	TrustedTypePolicy interface: window.trustedTypes.createPolicy("SomeName", { createHTML: s => s }) must inherit property "createScriptURL(DOMString, any...)" with the proper type
+Pass	TrustedTypePolicy interface: calling createScriptURL(DOMString, any...) on window.trustedTypes.createPolicy("SomeName", { createHTML: s => s }) with too few arguments must throw TypeError
+Pass	Window interface: attribute trustedTypes
\ No newline at end of file
diff --git a/Tests/LibWeb/Text/input/wpt-import/interfaces/trusted-types.idl b/Tests/LibWeb/Text/input/wpt-import/interfaces/trusted-types.idl
new file mode 100644
index 00000000000..b6008e18725
--- /dev/null
+++ b/Tests/LibWeb/Text/input/wpt-import/interfaces/trusted-types.idl
@@ -0,0 +1,65 @@
+// GENERATED CONTENT - DO NOT EDIT
+// Content was automatically extracted by Reffy into webref
+// (https://github.com/w3c/webref)
+// Source: Trusted Types (https://w3c.github.io/trusted-types/dist/spec/)
+
+[Exposed=(Window,Worker)]
+interface TrustedHTML {
+  stringifier;
+  DOMString toJSON();
+};
+
+[Exposed=(Window,Worker)]
+interface TrustedScript {
+  stringifier;
+  DOMString toJSON();
+};
+
+[Exposed=(Window,Worker)]
+interface TrustedScriptURL {
+  stringifier;
+  USVString toJSON();
+};
+
+[Exposed=(Window,Worker)] interface TrustedTypePolicyFactory {
+    TrustedTypePolicy createPolicy(
+        DOMString policyName, optional TrustedTypePolicyOptions policyOptions = {});
+    boolean isHTML(any value);
+    boolean isScript(any value);
+    boolean isScriptURL(any value);
+    readonly attribute TrustedHTML emptyHTML;
+    readonly attribute TrustedScript emptyScript;
+    DOMString? getAttributeType(
+        DOMString tagName,
+        DOMString attribute,
+        optional DOMString? elementNs = "",
+        optional DOMString? attrNs = "");
+    DOMString? getPropertyType(
+        DOMString tagName,
+        DOMString property,
+        optional DOMString? elementNs = "");
+    readonly attribute TrustedTypePolicy? defaultPolicy;
+};
+
+[Exposed=(Window,Worker)]
+interface TrustedTypePolicy {
+  readonly attribute DOMString name;
+  TrustedHTML createHTML(DOMString input, any... arguments);
+  TrustedScript createScript(DOMString input, any... arguments);
+  TrustedScriptURL createScriptURL(DOMString input, any... arguments);
+};
+
+dictionary TrustedTypePolicyOptions {
+   CreateHTMLCallback createHTML;
+   CreateScriptCallback createScript;
+   CreateScriptURLCallback createScriptURL;
+};
+callback CreateHTMLCallback = DOMString? (DOMString input, any... arguments);
+callback CreateScriptCallback = DOMString? (DOMString input, any... arguments);
+callback CreateScriptURLCallback = USVString? (DOMString input, any... arguments);
+
+typedef (TrustedHTML or TrustedScript or TrustedScriptURL) TrustedType;
+
+partial interface mixin WindowOrWorkerGlobalScope {
+  readonly attribute TrustedTypePolicyFactory trustedTypes;
+};
diff --git a/Tests/LibWeb/Text/input/wpt-import/trusted-types/TrustedTypePolicy-CSP-no-name.html b/Tests/LibWeb/Text/input/wpt-import/trusted-types/TrustedTypePolicy-CSP-no-name.html
new file mode 100644
index 00000000000..1dd49d5197e
--- /dev/null
+++ b/Tests/LibWeb/Text/input/wpt-import/trusted-types/TrustedTypePolicy-CSP-no-name.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<script src="../resources/testharness.js" ></script>
+<script src="../resources/testharnessreport.js"></script>
+<script src="support/helper.sub.js"></script>
+
+<meta http-equiv="Content-Security-Policy" content="trusted-types">
+<body>
+<script>
+  // No name given test
+  test(t => {
+    assert_throws_js(TypeError,
+      () => window.trustedTypes.createPolicy('SomeName', { createHTML: s => s } ),
+      "createPolicy with an empty trusted-types CSP directive");
+  }, "No name list given - policy creation fails.");
+</script>
+
diff --git a/Tests/LibWeb/Text/input/wpt-import/trusted-types/TrustedTypePolicy-CSP-wildcard.html b/Tests/LibWeb/Text/input/wpt-import/trusted-types/TrustedTypePolicy-CSP-wildcard.html
new file mode 100644
index 00000000000..e843116559d
--- /dev/null
+++ b/Tests/LibWeb/Text/input/wpt-import/trusted-types/TrustedTypePolicy-CSP-wildcard.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<script src="../resources/testharness.js" ></script>
+<script src="../resources/testharnessreport.js"></script>
+<script src="support/helper.sub.js"></script>
+
+<body>
+<script>
+  test(t => {
+    let policy = window.trustedTypes.createPolicy('SomeName', { createHTML: s => s } );
+    assert_equals(policy.name, 'SomeName');
+  }, "CSP supports wildcards.");
+</script>
diff --git a/Tests/LibWeb/Text/input/wpt-import/trusted-types/TrustedTypePolicyFactory-constants.html b/Tests/LibWeb/Text/input/wpt-import/trusted-types/TrustedTypePolicyFactory-constants.html
new file mode 100644
index 00000000000..87ef8c83875
--- /dev/null
+++ b/Tests/LibWeb/Text/input/wpt-import/trusted-types/TrustedTypePolicyFactory-constants.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<script src="../resources/testharness.js"></script>
+<script src="../resources/testharnessreport.js"></script>
+<script src="support/helper.sub.js"></script>
+
+<body>
+<script>
+  test(t => {
+    const empty = trustedTypes.emptyHTML;
+    assert_true(trustedTypes.isHTML(empty));
+    assert_equals(empty.toString(), "");
+  }, 'trustedTypes.emptyHTML returns the intended value.');
+
+  test(t => {
+    try { trustedTypes.emptyHTML = 'fake'; } catch { }
+    assert_true(trustedTypes.isHTML(trustedTypes.emptyHTML));
+    assert_equals(trustedTypes.emptyHTML.toString(), "");
+  }, 'trustedTypes.emptyHTML cannot be redefined.');
+
+  test(t => {
+    try { Object.defineProperty(TrustedTypes, 'emptyHTML', 'fake'); } catch { }
+    assert_true(trustedTypes.isHTML(trustedTypes.emptyHTML));
+    assert_equals(trustedTypes.emptyHTML.toString(), "");
+  }, 'trustedTypes.emptyHTML cannot be redefined via defineProperty.');
+
+  test(t => {
+    const empty = trustedTypes.emptyScript;
+    assert_true(trustedTypes.isScript(empty));
+    assert_equals(empty.toString(), "");
+  }, 'trustedTypes.emptyScript returns the intended value.');
+
+  test(t => {
+    try { trustedTypes.emptyScript = 'fake'; } catch { }
+    assert_true(trustedTypes.isScript(trustedTypes.emptyScript));
+    assert_equals(trustedTypes.emptyScript.toString(), "");
+  }, 'trustedTypes.emptyScript cannot be redefined.');
+
+  test(t => {
+    try { Object.defineProperty(TrustedTypes, 'emptyScript', 'fake'); } catch { }
+    assert_true(trustedTypes.isScript(trustedTypes.emptyScript));
+    assert_equals(trustedTypes.emptyScript.toString(), "");
+  }, 'trustedTypes.emptyScript cannot be redefined via defineProperty.');
+</script>
diff --git a/Tests/LibWeb/Text/input/wpt-import/trusted-types/idlharness.window.html b/Tests/LibWeb/Text/input/wpt-import/trusted-types/idlharness.window.html
new file mode 100644
index 00000000000..3391b94c2aa
--- /dev/null
+++ b/Tests/LibWeb/Text/input/wpt-import/trusted-types/idlharness.window.html
@@ -0,0 +1,9 @@
+<!doctype html>
+<meta charset=utf-8>
+
+<script src="../resources/testharness.js"></script>
+<script src="../resources/testharnessreport.js"></script>
+<script src="../resources/WebIDLParser.js"></script>
+<script src="../resources/idlharness.js"></script>
+<div id=log></div>
+<script src="../trusted-types/idlharness.window.js"></script>
diff --git a/Tests/LibWeb/Text/input/wpt-import/trusted-types/idlharness.window.js b/Tests/LibWeb/Text/input/wpt-import/trusted-types/idlharness.window.js
new file mode 100644
index 00000000000..07847fdb39e
--- /dev/null
+++ b/Tests/LibWeb/Text/input/wpt-import/trusted-types/idlharness.window.js
@@ -0,0 +1,16 @@
+// META: script=/resources/WebIDLParser.js
+// META: script=/resources/idlharness.js
+
+idl_test(
+    ['trusted-types'],
+    ['html', 'dom'],
+    idl_array => {
+      idl_array.add_objects({
+        TrustedTypePolicyFactory: ['window.trustedTypes'],
+        TrustedTypePolicy: ['window.trustedTypes.createPolicy("SomeName", { createHTML: s => s })'],
+        TrustedHTML: ['window.trustedTypes.createPolicy("SomeName1", { createHTML: s => s }).createHTML("A string")'],
+        TrustedScript: ['window.trustedTypes.createPolicy("SomeName2", { createScript: s => s }).createScript("A string")'],
+        TrustedScriptURL: ['window.trustedTypes.createPolicy("SomeName3", { createScriptURL: s => s }).createScriptURL("A string")'],
+      });
+    }
+);