diff --git a/resources/testharness.js b/resources/testharness.js
index f4737577..d9aa44c0 100644
--- a/resources/testharness.js
+++ b/resources/testharness.js
@@ -4994,6 +4994,17 @@ window.addEventListener = function (evt, callback) {
         callback(e);
     });
 };
+
+(async () => {
+try {
+    await import('./fixtures/tla.js');
+} catch (e) {
+    // Does not support TLA -> skip test
+    await fetch('/TLA UNSUPPORTED');
+    fetch('/done');
+}
+})();
+
 </script>`);
 setup({ allow_uncaught_exception: true });
 add_completion_callback((tests, status, asserts) => {
diff --git a/test/test-source-phase.html b/test/test-source-phase.html
deleted file mode 100644
index 7117014b..00000000
--- a/test/test-source-phase.html
+++ /dev/null
@@ -1,69 +0,0 @@
-<!doctype html>
-<title>Source Phase WPT HTML Test</title>
-<script type="module" src="../src/es-module-shims.js"></script>
-<script>
-  window.esmsInitOptions = {
-    polyfillEnable: ['wasm-modules', 'source-phase']
-  };
-  window.assert_true = (predicate) => {
-    if (!predicate) {
-      fetch(`/error`);
-      throw new Error('Not true');
-    }
-  };
-  window.assert_equals = (a, b) => {
-    if (a !== b) {
-      fetch(`/error`);
-      throw new Error('Not equal');
-    }
-  };
-  window.assert_array_equals = (a, b) => {
-    for (let i = 0; i < Math.max(a.length, b.length); i++) {
-      if (a[i] !== b[i]) {
-        fetch(`/error`);
-        throw new Error('Not array equal');
-      }
-    }
-  };
-</script>
-<!-- from wasm/webapi/esm-integration/source-phase.tentative.html -->
-<script type=module>
-  import source exportedNamesSource from "./resources/exported-names.wasm";
-  
-  assert_true(exportedNamesSource instanceof WebAssembly.Module);
-  const AbstractModuleSource = Object.getPrototypeOf(WebAssembly.Module);
-  assert_equals(AbstractModuleSource.name, "AbstractModuleSource");
-  assert_true(exportedNamesSource instanceof AbstractModuleSource);
-  
-  assert_array_equals(WebAssembly.Module.exports(exportedNamesSource).map(({ name }) => name).sort(),
-                      ["func", "glob", "mem", "tab"]);
-  
-  const wasmImportFromWasmSource = await import.source("./resources/wasm-import-from-wasm.wasm");
-  
-  assert_true(wasmImportFromWasmSource instanceof WebAssembly.Module);
-  
-  let logged = false;
-  const instance = await WebAssembly.instantiate(wasmImportFromWasmSource, {
-    "./wasm-export-to-wasm.wasm": {
-      log () {
-        logged = true;
-      }
-    }
-  });
-  instance.exports.logExec();
-  assert_true(logged);
-
-  fetch('/done');
-</script>
-<script>
-  (async () => {
-    try {
-      await import('./fixtures/tla.js');
-    } catch (e) {
-      // Does not support TLA -> skip test
-      await fetch('/TLA UNSUPPORTED');
-      fetch('/done');
-    }
-  })();
-</script>
-<body></body>
