diff --git a/test/general/openpgp.js b/test/general/openpgp.js
index 5a03b3e7..5588aa7f 100644
--- a/test/general/openpgp.js
+++ b/test/general/openpgp.js
@@ -1,4 +1,4 @@
-/* globals tryWorker: true */
+/* globals tryTests: true */
 
 'use strict';
 
@@ -403,7 +403,7 @@ describe('OpenPGP.js public api tests', function() {
   });
 
   describe('encrypt, decrypt, sign, verify - integration tests', function() {
-    var privateKey, publicKey, zeroCopyVal, useNativeVal;
+    var privateKey, publicKey, zeroCopyVal, useNativeVal, aead_protectVal;
 
     beforeEach(function() {
       publicKey = openpgp.key.readArmored(pub_key);
@@ -414,11 +414,13 @@ describe('OpenPGP.js public api tests', function() {
       expect(privateKey.err).to.not.exist;
       zeroCopyVal = openpgp.config.zeroCopy;
       useNativeVal = openpgp.config.useNative;
+      aead_protectVal = openpgp.config.aead_protect;
     });
 
     afterEach(function() {
       openpgp.config.zeroCopy = zeroCopyVal;
       openpgp.config.useNative = useNativeVal;
+      openpgp.config.aead_protect = aead_protectVal;
     });
 
     it('Decrypting key with wrong passphrase returns false', function () {
@@ -429,13 +431,42 @@ describe('OpenPGP.js public api tests', function() {
       expect(privateKey.keys[0].decrypt(passphrase)).to.be.true;
     });
 
-    describe('without Worker', tests);
+    tryTests('CFB mode (asm.js)', tests, {
+      if: true,
+      beforeEach: function() {
+        openpgp.config.useNative = false;
+        openpgp.config.aead_protect = false;
+      }
+    });
 
-    tryWorker('with Worker', tests, function() {
-      openpgp.config.useNative = false;
-      openpgp.initWorker({ path:'../dist/openpgp.worker.js' });
-    }, function() {
-      openpgp.destroyWorker(); // cleanup worker in case of failure
+    tryTests('CFB mode (asm.js, worker)', tests, {
+      if: typeof window !== 'undefined' && window.Worker,
+      before: function() {
+        openpgp.initWorker({ path:'../dist/openpgp.worker.js' });
+      },
+      beforeEach: function() {
+        openpgp.config.useNative = false;
+        openpgp.config.aead_protect = false;
+      },
+      after: function() {
+        openpgp.destroyWorker();
+      }
+    });
+
+    tryTests('GCM mode (asm.js)', tests, {
+      if: true,
+      beforeEach: function() {
+        openpgp.config.useNative = false;
+        openpgp.config.aead_protect = true;
+      }
+    });
+
+    tryTests('GCM mode (native)', tests, {
+      if: openpgp.util.getWebCrypto(),
+      beforeEach: function() {
+        openpgp.config.useNative = true;
+        openpgp.config.aead_protect = true;
+      }
     });
 
     function tests() {
diff --git a/test/unittests.js b/test/unittests.js
index 9ed7383a..6af30273 100644
--- a/test/unittests.js
+++ b/test/unittests.js
@@ -6,17 +6,19 @@
   return new Promise(function(res, rej) { rej(val); });
 };
 
-(typeof window !== 'undefined' ? window : global).tryWorker = function(name, tests, beforeFn, afterFn) {
-  if (typeof window !== 'undefined' && window.Worker) {
+(typeof window !== 'undefined' ? window : global).tryTests = function(name, tests, options) {
+  if (options.if) {
     describe(name, function() {
-      before(beforeFn);
+      if (options.before) { before(options.before); }
+      if (options.beforeEach) { beforeEach(options.beforeEach); }
 
       tests();
 
-      after(afterFn);
+      if (options.afterEach) { afterEach(options.afterEach); }
+      if (options.after) { after(options.after); }
     });
   } else {
-    describe.skip(name + ' (No Web Worker support --> skipping tests)', tests);
+    describe.skip(name + ' (no support --> skipping tests)', tests);
   }
 };
 
diff --git a/test/worker/async_proxy.js b/test/worker/async_proxy.js
index 66170871..c90bd71b 100644
--- a/test/worker/async_proxy.js
+++ b/test/worker/async_proxy.js
@@ -1,4 +1,4 @@
-/* globals tryWorker: true */
+/* globals tryTests: true */
 
 'use strict';
 
@@ -35,11 +35,15 @@ var pub_key =
 var plaintext = 'short message\nnext line\n한국어/조선말';
 var pubKey;
 
-tryWorker('Async Proxy', tests, function() {
-  openpgp.initWorker({ path:'../dist/openpgp.worker.js' });
-  pubKey = openpgp.key.readArmored(pub_key).keys[0];
-}, function() {
-  openpgp.destroyWorker();
+tryTests('Async Proxy', tests, {
+  if: typeof window !== 'undefined' && window.Worker,
+  before: function() {
+    openpgp.initWorker({ path:'../dist/openpgp.worker.js' });
+    pubKey = openpgp.key.readArmored(pub_key).keys[0];
+  },
+  after: function() {
+    openpgp.destroyWorker();
+  }
 });
 
 function tests() {