deleted file mode 100644
--- a/toolkit/mozapps/extensions/test/addons/test_bug757663/install.rdf
+++ /dev/null
@@ -1,24 +0,0 @@
-<?xml version="1.0"?>
-
-<RDF xmlns="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-     xmlns:em="http://www.mozilla.org/2004/em-rdf#">
-
-  <Description about="urn:mozilla:install-manifest">
-    <em:id>bug757663@tests.mozilla.org</em:id>
-    <em:version>1.0</em:version>
-    <em:bootstrap>true</em:bootstrap>
-
-    <!-- Front End MetaData -->
-    <em:name>Test Bootstrap 1</em:name>
-    <em:description>Test Description</em:description>
-
-    <em:targetApplication>
-      <Description>
-        <em:id>xpcshell@tests.mozilla.org</em:id>
-        <em:minVersion>1</em:minVersion>
-        <em:maxVersion>1</em:maxVersion>
-      </Description>
-    </em:targetApplication>
-
-  </Description>
-</RDF>

deleted file mode 100644
--- a/toolkit/mozapps/extensions/test/xpcshell/test_bug757663.js
+++ /dev/null
@@ -1,112 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
- * http://creativecommons.org/publicdomain/zero/1.0/
- */
-
-// This test verifies that removing a listener during a callback for that type
-// of listener still results in all listeners being called.
-
-var addon1 = {
-  id: "addon1@tests.mozilla.org",
-  version: "2.0",
-  name: "Test 1",
-  bootstrap: "true",
-  targetApplications: [{
-    id: "xpcshell@tests.mozilla.org",
-    minVersion: "1",
-    maxVersion: "1"
-  }]
-};
-
-var listener1 = {
-  sawEvent: false,
-  onDisabling() {
-    this.sawEvent = true;
-    AddonManager.removeAddonListener(this);
-  },
-  onNewInstall() {
-    this.sawEvent = true;
-    AddonManager.removeInstallListener(this);
-  }
-};
-var listener2 = {
-  sawEvent: false,
-  onDisabling() {
-    this.sawEvent = true;
-  },
-  onNewInstall() {
-    this.sawEvent = true;
-  }
-};
-var listener3 = {
-  sawEvent: false,
-  onDisabling() {
-    this.sawEvent = true;
-  },
-  onNewInstall() {
-    this.sawEvent = true;
-  }
-};
-
-const profileDir = gProfD.clone();
-profileDir.append("extensions");
-
-
-function run_test() {
-  do_test_pending();
-  createAppInfo("xpcshell@tests.mozilla.org", "XPCShell", "1", "1.9.2");
-
-  writeInstallRDFForExtension(addon1, profileDir);
-  startupManager();
-
-  run_test_1();
-}
-
-function run_test_1() {
-  AddonManager.addAddonListener(listener1);
-  AddonManager.addAddonListener(listener2);
-  AddonManager.addAddonListener(listener3);
-
-  AddonManager.getAddonsByIDs(["addon1@tests.mozilla.org"], function([a1]) {
-    Assert.notEqual(a1, null);
-    Assert.ok(!a1.userDisabled);
-    Assert.ok(a1.isActive);
-
-    a1.userDisabled = true;
-
-    Assert.ok(listener1.sawEvent);
-    listener1.sawEvent = false;
-    Assert.ok(listener2.sawEvent);
-    listener2.sawEvent = false;
-    Assert.ok(listener3.sawEvent);
-    listener3.sawEvent = false;
-
-    AddonManager.removeAddonListener(listener1);
-    AddonManager.removeAddonListener(listener2);
-    AddonManager.removeAddonListener(listener3);
-
-    a1.uninstall();
-    run_test_2();
-  });
-}
-
-function run_test_2() {
-  AddonManager.addInstallListener(listener1);
-  AddonManager.addInstallListener(listener2);
-  AddonManager.addInstallListener(listener3);
-
-  AddonManager.getInstallForFile(do_get_addon("test_bug757663"), function(aInstall) {
-
-    Assert.ok(listener1.sawEvent);
-    listener1.sawEvent = false;
-    Assert.ok(listener2.sawEvent);
-    listener2.sawEvent = false;
-    Assert.ok(listener3.sawEvent);
-    listener3.sawEvent = false;
-
-    AddonManager.removeInstallListener(listener1);
-    AddonManager.removeInstallListener(listener2);
-    AddonManager.removeInstallListener(listener3);
-
-    executeSoon(do_test_finished);
-  });
-}

--- a/toolkit/mozapps/extensions/test/xpcshell/xpcshell.ini
+++ b/toolkit/mozapps/extensions/test/xpcshell/xpcshell.ini
@@ -90,17 +90,16 @@ skip-if = os == "win" # Bug 1358846
 fail-if = os == "android"
 [test_bug619730.js]
 tags = blocklist
 [test_bug620837.js]
 tags = blocklist
 [test_bug655254.js]
 [test_bug740612.js]
 [test_bug753900.js]
-[test_bug757663.js]
 [test_cache_certdb.js]
 run-if = addon_signing
 [test_cacheflush.js]
 [test_childprocess.js]
 [test_compatoverrides.js]
 [test_corrupt.js]
 [test_corruptfile.js]
 [test_db_path.js]