diff --git a/.travis.yml b/.travis.yml
index 3450daf0..82df9c30 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -50,7 +50,6 @@ matrix:
     - env: OPENPGPJSTEST='end2end-5' BROWSER='chrome beta'
     - env: OPENPGPJSTEST='end2end-7' BROWSER='microsoft edge 20.10240'
     - env: OPENPGPJSTEST='end2end-8' BROWSER='safari 8'
-    - env: OPENPGPJSTEST='end2end-9' BROWSER='safari 9'
     - env: OPENPGPJSTEST='end2end-10' BROWSER='android 4.4'
     - env: OPENPGPJSTEST='end2end-11' BROWSER='android 5.1'
     - env: OPENPGPJSTEST='end2end-12' BROWSER='iphone 7.0'
diff --git a/test/general/basic.js b/test/general/basic.js
index 74f9d197..07977adc 100644
--- a/test/general/basic.js
+++ b/test/general/basic.js
@@ -13,9 +13,7 @@ describe('Basic', function() {
       var privKey;
       var pubKey;
 
-      if (openpgp.util.getWebCrypto()) {
-        opt.numBits = 2048; // webkit webcrypto accepts minimum 2048 bit keys
-      }
+      if (openpgp.util.getWebCrypto()) { opt.numBits = 2048; } // webkit webcrypto accepts minimum 2048 bit keys
 
       openpgp.generateKeyPair(opt).then(function(key) {
 
@@ -77,6 +75,8 @@ describe('Basic', function() {
       var msg;
 
       var opt = {numBits: 512, userId: userid, passphrase: passphrase};
+      if (openpgp.util.getWebCrypto()) { opt.numBits = 2048; } // webkit webcrypto accepts minimum 2048 bit keys
+
       openpgp.generateKeyPair(opt).then(function(key) {
 
         var privKeys = openpgp.key.readArmored(key.privateKeyArmored);
@@ -128,6 +128,8 @@ describe('Basic', function() {
       var passphrase = 'password';
 
       var opt = {numBits: 512, userId: userid, passphrase: passphrase};
+      if (openpgp.util.getWebCrypto()) { opt.numBits = 2048; } // webkit webcrypto accepts minimum 2048 bit keys
+
       openpgp.generateKeyPair(opt).then(function(key) {
 
         var privKeys = openpgp.key.readArmored(key.privateKeyArmored);
diff --git a/test/general/key.js b/test/general/key.js
index 50e52c3f..a32f4e3a 100644
--- a/test/general/key.js
+++ b/test/general/key.js
@@ -635,6 +635,7 @@ var pgp_desktop_priv =
       expect(key.users[0].selfCertifications[0].features).to.eql(openpgp.config.integrity_protect ? [1] : null); // modification detection
     };
     var opt = {numBits: 512, userId: 'test', passphrase: 'hello'};
+    if (openpgp.util.getWebCrypto()) { opt.numBits = 2048; } // webkit webcrypto accepts minimum 2048 bit keys
     openpgp.generateKeyPair(opt).then(function(key) {
       testPref(key.key);
       testPref(openpgp.key.readArmored(key.publicKeyArmored).keys[0]);
@@ -658,6 +659,7 @@ var pgp_desktop_priv =
 
   it('Generated key is not unlocked by default', function(done) {
     var opt = {numBits: 512, userId: 'test', passphrase: '123'};
+    if (openpgp.util.getWebCrypto()) { opt.numBits = 2048; } // webkit webcrypto accepts minimum 2048 bit keys
     openpgp.generateKeyPair(opt).then(function(key) {
       var msg = openpgp.message.fromText('hello').encrypt([key.key]);
       msg = msg.decrypt.bind(msg, key.key);
@@ -669,6 +671,7 @@ var pgp_desktop_priv =
   it('Generate key - single userid', function(done) {
     var userId = 'single user';
     var opt = {numBits: 512, userId: userId, passphrase: '123'};
+    if (openpgp.util.getWebCrypto()) { opt.numBits = 2048; } // webkit webcrypto accepts minimum 2048 bit keys
     openpgp.generateKeyPair(opt).then(function(key) {
       key = key.key;
       expect(key.users.length).to.equal(1);
@@ -681,6 +684,7 @@ var pgp_desktop_priv =
     var userId1 = 'first user';
     var userId2 = 'second user';
     var opt = {numBits: 512, userId: [userId1, userId2], passphrase: '123'};
+    if (openpgp.util.getWebCrypto()) { opt.numBits = 2048; } // webkit webcrypto accepts minimum 2048 bit keys
     openpgp.generateKeyPair(opt).then(function(key) {
       key = key.key;
       expect(key.users.length).to.equal(2);
diff --git a/test/general/packet.js b/test/general/packet.js
index 82904fe5..07348166 100644
--- a/test/general/packet.js
+++ b/test/general/packet.js
@@ -137,8 +137,9 @@ describe("Packet", function() {
 
   it('Public key encrypted symmetric key packet', function(done) {
     var rsa = new openpgp.crypto.publicKey.rsa();
+    var keySize = openpgp.util.getWebCrypto() ? 2048 : 512; // webkit webcrypto accepts minimum 2048 bit keys
 
-    rsa.generate(512, "10001").then(function(mpiGen) {
+    rsa.generate(keySize, "10001").then(function(mpiGen) {
 
       var mpi = [mpiGen.n, mpiGen.ee, mpiGen.d, mpiGen.p, mpiGen.q, mpiGen.u];
       mpi = mpi.map(function(k) {
@@ -400,8 +401,9 @@ describe("Packet", function() {
     key.push(new openpgp.packet.SecretKey());
 
     var rsa = new openpgp.crypto.publicKey.rsa();
+    var keySize = openpgp.util.getWebCrypto() ? 2048 : 512; // webkit webcrypto accepts minimum 2048 bit keys
 
-    rsa.generate(512, "10001").then(function(mipGen) {
+    rsa.generate(keySize, "10001").then(function(mipGen) {
       var mpi = [mipGen.n, mipGen.ee, mipGen.d, mipGen.p, mipGen.q, mipGen.u];
       mpi = mpi.map(function(k) {
         var mpi = new openpgp.MPI();
@@ -428,8 +430,9 @@ describe("Packet", function() {
     var key = new openpgp.packet.SecretKey();
 
     var rsa = new openpgp.crypto.publicKey.rsa();
+    var keySize = openpgp.util.getWebCrypto() ? 2048 : 512; // webkit webcrypto accepts minimum 2048 bit keys
 
-    rsa.generate(512, "10001").then(function(mpiGen) {
+    rsa.generate(keySize, "10001").then(function(mpiGen) {
         var mpi = [mpiGen.n, mpiGen.ee, mpiGen.d, mpiGen.p, mpiGen.q, mpiGen.u];
         mpi = mpi.map(function(k) {
           var mpi = new openpgp.MPI();
diff --git a/test/general/signature.js b/test/general/signature.js
index e6d3a7cb..2d81ebae 100644
--- a/test/general/signature.js
+++ b/test/general/signature.js
@@ -642,6 +642,7 @@ describe("Signature", function() {
 
   it('Sign message with key without password', function(done) {
     var opt = {numBits: 512, userId: 'ABC', passphrase: null};
+    if (openpgp.util.getWebCrypto()) { opt.numBits = 2048; } // webkit webcrypto accepts minimum 2048 bit keys
     openpgp.generateKeyPair(opt).then(function(gen) {
       var key = gen.key;
 
diff --git a/test/worker/api.js b/test/worker/api.js
index 3fac8a94..07bbcc73 100644
--- a/test/worker/api.js
+++ b/test/worker/api.js
@@ -455,7 +455,7 @@ describe('High level API', function() {
 
     it('Error on wrong password decryptKey', function (done) {
       proxy.decryptKey(privKeyRSA, 'what?').catch(function(err) {
-        expect(err).to.eql(new Error('Wrong password'));
+        expect(err.message).to.eql('Wrong password');
         done();
       });
     });
@@ -463,7 +463,7 @@ describe('High level API', function() {
     it('Error on wrong password decryptKeyPacket', function (done) {
       var keyid = privKeyRSA.subKeys[0].subKey.getKeyId();
       proxy.decryptKeyPacket(privKeyRSA, [keyid], 'what?').catch(function(err) {
-        expect(err).to.eql(new Error('Wrong password'));
+        expect(err.message).to.eql('Wrong password');
         done();
       });
     });