--- a/toolkit/components/extensions/test/mochitest/test_ext_storage_content.html
+++ b/toolkit/components/extensions/test/mochitest/test_ext_storage_content.html
@@ -245,90 +245,12 @@ add_task(function* test_contentscript() 
   yield extension.awaitMessage("test-finished");
 
   yield SpecialPowers.popPrefEnv();
   yield extension.unload();
 
   win.close();
 });
 
-add_task(function* test_local_cache_invalidation() {
-  let win = window.open("file_sample.html");
-
-  function background(checkGet) {
-    browser.test.onMessage.addListener(async msg => {
-      if (msg === "set-initial") {
-        await browser.storage.local.set({"test-prop1": "value1", "test-prop2": "value2"});
-        browser.test.sendMessage("set-initial-done");
-      } else if (msg === "check") {
-        await checkGet("local", "test-prop1", "value1");
-        await checkGet("local", "test-prop2", "value2");
-        browser.test.sendMessage("check-done");
-      }
-    });
-
-    browser.test.sendMessage("ready");
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: ["storage"],
-    },
-    background: `(${background})(${checkGetImpl})`,
-  });
-
-  yield extension.startup();
-  yield extension.awaitMessage("ready");
-
-  extension.sendMessage("set-initial");
-  yield extension.awaitMessage("set-initial-done");
-
-  SpecialPowers.invalidateExtensionStorageCache();
-
-  extension.sendMessage("check");
-  yield extension.awaitMessage("check-done");
-
-  yield extension.unload();
-  win.close();
-});
-
-add_task(function* test_config_flag_needed() {
-  let win = window.open("file_sample.html");
-  yield waitForLoad(win);
-
-  yield SpecialPowers.pushPrefEnv({
-    set: [[STORAGE_SYNC_PREF, false]],
-  });
-
-  function background() {
-    let promises = [];
-    let apiTests = [
-      {method: "get", args: ["foo"]},
-      {method: "set", args: [{foo: "bar"}]},
-      {method: "remove", args: ["foo"]},
-      {method: "clear", args: []},
-    ];
-    apiTests.forEach(testDef => {
-      promises.push(browser.test.assertRejects(
-        browser.storage.sync[testDef.method](...testDef.args),
-        "Please set webextensions.storage.sync.enabled to true in about:config",
-        `storage.sync.${testDef.method} is behind a flag`));
-    });
-
-    Promise.all(promises).then(() => browser.test.notifyPass("flag needed"));
-  }
-
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      permissions: ["storage"],
-    },
-    background: `(${background})(${checkGetImpl})`,
-  });
-
-  yield extension.startup();
-  yield extension.awaitFinish("flag needed");
-  yield extension.unload();
-  win.close();
-});
 </script>
 
 </body>
 </html>