diff --git a/test/fixtures/devtools-extension/content.js b/test/fixtures/devtools-extension/content.js
index 5af9ae9..01f6f90 100644
--- a/test/fixtures/devtools-extension/content.js
+++ b/test/fixtures/devtools-extension/content.js
@@ -1,4 +1,6 @@
-test("devtools.inspectedWindow.eval resolved with an error result", async (t) => {
+test("devtools.inspectedWindow.eval resolved with an error result", {
+  timeout: 5000,
+}, async (t) => {
   const {evalResult} = await browser.runtime.sendMessage({
     apiMethod: "devtools.inspectedWindow.eval",
     params: ["throw new Error('fake error');"],
@@ -14,7 +16,9 @@ test("devtools.inspectedWindow.eval resolved with an error result", async (t) =>
        "the second element value property should include the expected error message");
 });
 
-test("devtools.inspectedWindow.eval resolved without an error result", async (t) => {
+test("devtools.inspectedWindow.eval resolved without an error result", {
+  timeout: 5000,
+}, async (t) => {
   const {evalResult} = await browser.runtime.sendMessage({
     apiMethod: "devtools.inspectedWindow.eval",
     params: ["[document.documentElement.localName]"],
diff --git a/test/fixtures/tape-standalone.js b/test/fixtures/tape-standalone.js
index 1face23..710bfd9 100644
--- a/test/fixtures/tape-standalone.js
+++ b/test/fixtures/tape-standalone.js
@@ -10,9 +10,30 @@ if (navigator.userAgent.includes("Chrome/")) {
 }
 
 // Export as a global a wrapped test function which enforces a timeout by default.
-window.test = (desc, fn) => {
-  tape(`${desc} (${browser})`, async (t) => {
-    t.timeoutAfter(DEFAULT_TIMEOUT);
+/**
+ * @param {string} desc
+ *        The test description
+ * @param {object} [options]
+ *        The test options, can be omitted.
+ * @param {number} [options.timeout=DEFAULT_TIMEOUT]
+ *        The time after which the test fails automatically, unless it has already passed.
+ * @param {boolean} [options.skip]
+ *        Whether the test case should be skipped.
+ * @param {function(tape.Test):(void|Promise<void>)} fn
+ *        The test case function, takes the test object as a callback.
+ */
+window.test = (desc, options, fn) => {
+  if (typeof options === "function") {
+    // Allow swapping options with fn
+    [fn, options] = [options, fn];
+  }
+
+  options = {
+    timeout: DEFAULT_TIMEOUT,
+    ...options,
+  };
+
+  tape(`${desc} (${browser})`, options, async (t) => {
     await fn(t);
   });
 };
diff --git a/test/integration/setup.js b/test/integration/setup.js
index 7a4665d..40af6c1 100644
--- a/test/integration/setup.js
+++ b/test/integration/setup.js
@@ -165,6 +165,7 @@ test.onFailure(() => {
  * @param {string} parameters.description
  * @param {string[]} parameters.extensions
  * @param {boolean|string|string[]} [parameters.skip]
+ * @param {boolean} [parameters.openDevTools]
  */
 const defineExtensionTests = ({description, extensions, skip, openDevTools}) => {
   for (const extensionDirName of extensions) {
@@ -192,8 +193,8 @@ const defineExtensionTests = ({description, extensions, skip, openDevTools}) =>
           path.join(__dirname, "..", "fixtures", extensionDirName));
         const srcPolyfill = path.join(__dirname, "..", "..", "dist", "browser-polyfill.js");
 
-        const tmpDir = tmp.dirSync({unsafeCleanup: true});
-        const extensionPath = path.join(tmpDir.name, extensionDirName);
+        tempDir = tmp.dirSync({unsafeCleanup: true});
+        const extensionPath = path.join(tempDir.name, extensionDirName);
 
         cp("-rf", srcExtensionPath, extensionPath);
         cp("-f", srcPolyfill, extensionPath);