diff --git a/apps/files/tests/js/fileUploadSpec.js b/apps/files/tests/js/fileUploadSpec.js
index aa8357bf26b0..946ac2a8cc45 100644
--- a/apps/files/tests/js/fileUploadSpec.js
+++ b/apps/files/tests/js/fileUploadSpec.js
@@ -133,7 +133,7 @@ describe('OC.Upload tests', function() {
 				'<input type="checkbox" id="select_all_files" class="select-all">' +
 				'<a class="name columntitle" data-sort="name"><span>Name</span><span class="sort-indicator"></span></a>' +
 				'<span id="selectedActionsList" class="selectedActions hidden">' +
-				'<a href class="download"><img src="actions/download.svg">Download</a>' +
+				'<a href class="download"><img/>Download</a>' +
 				'<a href class="delete-selected">Delete</a></span>' +
 				'</th>' +
 				'<th class="hidden column-size"><a class="columntitle" data-sort="size"><span class="sort-indicator"></span></a></th>' +
diff --git a/apps/files/tests/js/filelistSpec.js b/apps/files/tests/js/filelistSpec.js
index 48bddc13efb0..0463a50eaa59 100644
--- a/apps/files/tests/js/filelistSpec.js
+++ b/apps/files/tests/js/filelistSpec.js
@@ -94,7 +94,7 @@ describe('OCA.Files.FileList tests', function() {
 			'<input type="checkbox" id="select_all_files" class="select-all checkbox">' +
 			'<a class="name columntitle" data-sort="name"><span>Name</span><span class="sort-indicator"></span></a>' +
 			'<span id="selectedActionsList" class="selectedActions hidden">' +
-			'<a href class="download"><img src="actions/download.svg">Download</a>' +
+			'<a href class="download"><img/>Download</a>' +
 			'<a href class="delete-selected">Delete</a></span>' +
 			'</th>' +
 			'<th class="hidden column-size"><a class="columntitle" data-sort="size"><span class="sort-indicator"></span></a></th>' +
diff --git a/core/js/tests/specHelper.js b/core/js/tests/specHelper.js
index e096fda1d5ef..0f3f76f919e3 100644
--- a/core/js/tests/specHelper.js
+++ b/core/js/tests/specHelper.js
@@ -182,6 +182,7 @@ window.isPhantom = /phantom/i.test(navigator.userAgent);
 		// reset pop state handlers
 		OC.Util.History._handlers = [];
 
+		$(window).off('beforeunload');
 	});
 })();
 
diff --git a/core/js/tests/specs/coreSpec.js b/core/js/tests/specs/coreSpec.js
index 659b67fe5aa4..886ac5c24cd7 100644
--- a/core/js/tests/specs/coreSpec.js
+++ b/core/js/tests/specs/coreSpec.js
@@ -994,7 +994,12 @@ describe('Core base tests', function() {
 			var $rows = $el.find('.row');
 			expect($rows.length).toEqual(2);
 
+			// when called without arguments, a warning to be logged
+			// to ask devs to adjust their usage of the API.
+			// we stub it to avoid polluting the actual console
+			var warnStub = sinon.stub(console, 'warn');
 			OC.Notification.hide();
+			warnStub.restore();
 
 			$rows = $el.find('.row');
 			expect($rows.length).toEqual(1);
diff --git a/core/js/tests/specs/l10nSpec.js b/core/js/tests/specs/l10nSpec.js
index 2ceb2f4a916b..c2ef996d0494 100644
--- a/core/js/tests/specs/l10nSpec.js
+++ b/core/js/tests/specs/l10nSpec.js
@@ -7,7 +7,6 @@
  * See the COPYING-README file.
  *
  */
-
 describe('OC.L10N tests', function() {
 	var TEST_APP = 'jsunittestapp';
 
@@ -25,7 +24,7 @@ describe('OC.L10N tests', function() {
 				'Hello world!': 'Hallo Welt!',
 				'Hello {name}, the weather is {weather}': 'Hallo {name}, das Wetter ist {weather}',
 				'sunny': 'sonnig'
-			});
+			}, 'nplurals=2; plural=(n != 1);');
 		});
 		it('returns untranslated text when no bundle exists', function() {
 			delete OC.L10N._bundles[TEST_APP];
@@ -56,12 +55,21 @@ describe('OC.L10N tests', function() {
 			OC.L10N.register(TEST_APP, {
 				'sunny': 'sonnig',
 				'new': 'neu'
-			});
+			}, 'nplurals=2; plural=(n != 1);');
 			expect(t(TEST_APP, 'sunny')).toEqual('sonnig');
 			expect(t(TEST_APP, 'new')).toEqual('neu');
 		});
 	});
 	describe('plurals', function() {
+		var warnStub;
+
+		beforeEach(function() {
+			warnStub = sinon.stub(console, 'warn');
+		});
+		afterEach(function() { 
+			warnStub.restore(); 
+		});
+	
 		function checkPlurals() {
 			expect(
 				n(TEST_APP, 'download %n file', 'download %n files', 0)
@@ -80,6 +88,7 @@ describe('OC.L10N tests', function() {
 		it('generates plural for default text when translation does not exist', function() {
 			OC.L10N.register(TEST_APP, {
 			});
+			expect(warnStub.called).toEqual(true);
 			expect(
 				n(TEST_APP, 'download %n file', 'download %n files', 0)
 			).toEqual('download 0 files');
@@ -98,6 +107,7 @@ describe('OC.L10N tests', function() {
 				'_download %n file_::_download %n files_':
 					['%n Datei herunterladen', '%n Dateien herunterladen']
 			});
+			expect(warnStub.called).toEqual(true);
 			checkPlurals();
 		});
 		it('generates plural with generated function when forms is specified', function() {
@@ -105,6 +115,7 @@ describe('OC.L10N tests', function() {
 				'_download %n file_::_download %n files_':
 					['%n Datei herunterladen', '%n Dateien herunterladen']
 			}, 'nplurals=2; plural=(n != 1);');
+			expect(warnStub.notCalled).toEqual(true);
 			checkPlurals();
 		});
 		it('generates plural with function when forms is specified as function', function() {
@@ -117,6 +128,7 @@ describe('OC.L10N tests', function() {
 					plural: (n !== 1) ? 1 : 0
 				};
 			});
+			expect(warnStub.notCalled).toEqual(true);
 			checkPlurals();
 		});
 	});
@@ -152,7 +164,7 @@ describe('OC.L10N tests', function() {
 			var callbackStub = sinon.stub();
 			OC.L10N.register(TEST_APP, {
 				'Hello world!': 'Hallo Welt!'
-			});
+			}, 'nplurals=2; plural=(n != 1);');
 			OC.L10N.load(TEST_APP, callbackStub).then(promiseStub);
 			expect(callbackStub.calledOnce).toEqual(true);
 			expect(promiseStub.calledOnce).toEqual(true);