diff --git a/polygerrit-ui/app/elements/admin/gr-group-members/gr-group-members_test.html b/polygerrit-ui/app/elements/admin/gr-group-members/gr-group-members_test.html
index 609a00d..1df2a41 100644
--- a/polygerrit-ui/app/elements/admin/gr-group-members/gr-group-members_test.html
+++ b/polygerrit-ui/app/elements/admin/gr-group-members/gr-group-members_test.html
@@ -245,31 +245,43 @@
       });
     });
 
-    test('_getAccountSuggestions empty', () => element
-        ._getAccountSuggestions('nonexistent').then(accounts => {
-          assert.equal(accounts.length, 0);
-        }));
+    test('_getAccountSuggestions empty', done => {
+      element
+          ._getAccountSuggestions('nonexistent').then(accounts => {
+            assert.equal(accounts.length, 0);
+            done();
+          });
+    });
 
-    test('_getAccountSuggestions non-empty', () => element
-        ._getAccountSuggestions('test-').then(accounts => {
-          assert.equal(accounts.length, 3);
-          assert.equal(accounts[0].name,
-              'test-account <test.account@example.com>');
-          assert.equal(accounts[1].name, 'test-admin <test.admin@example.com>');
-          assert.equal(accounts[2].name, 'test-git');
-        }));
+    test('_getAccountSuggestions non-empty', done => {
+      element
+          ._getAccountSuggestions('test-').then(accounts => {
+            assert.equal(accounts.length, 3);
+            assert.equal(accounts[0].name,
+                'test-account <test.account@example.com>');
+            assert.equal(accounts[1].name, 'test-admin <test.admin@example.com>');
+            assert.equal(accounts[2].name, 'test-git');
+            done();
+          });
+    });
 
-    test('_getGroupSuggestions empty', () => element
-        ._getGroupSuggestions('nonexistent').then(groups => {
-          assert.equal(groups.length, 0);
-        }));
+    test('_getGroupSuggestions empty', done => {
+      element
+          ._getGroupSuggestions('nonexistent').then(groups => {
+            assert.equal(groups.length, 0);
+            done();
+          });
+    });
 
-    test('_getGroupSuggestions non-empty', () => element
-        ._getGroupSuggestions('test').then(groups => {
-          assert.equal(groups.length, 2);
-          assert.equal(groups[0].name, 'test-admin');
-          assert.equal(groups[1].name, 'test/Administrator (admin)');
-        }));
+    test('_getGroupSuggestions non-empty', done => {
+      element
+          ._getGroupSuggestions('test').then(groups => {
+            assert.equal(groups.length, 2);
+            assert.equal(groups[0].name, 'test-admin');
+            assert.equal(groups[1].name, 'test/Administrator (admin)');
+            done();
+          });
+    });
 
     test('_computeHideItemClass returns string for admin', () => {
       const admin = true;
diff --git a/polygerrit-ui/app/elements/admin/gr-repo/gr-repo_test.html b/polygerrit-ui/app/elements/admin/gr-repo/gr-repo_test.html
index 6f68525..7b79a7e3 100644
--- a/polygerrit-ui/app/elements/admin/gr-repo/gr-repo_test.html
+++ b/polygerrit-ui/app/elements/admin/gr-repo/gr-repo_test.html
@@ -307,13 +307,18 @@
         });
       });
 
-      test('inherited submit type value is calculated correctly', () => element
-          ._loadRepo().then(() => {
-            const sel = element.$.submitTypeSelect;
-            assert.equal(sel.bindValue, 'INHERIT');
-            assert.equal(
-                sel.nativeSelect.options[0].text, 'Inherit (Merge if necessary)');
-          }));
+      test('inherited submit type value is calculated correctly', done => {
+        element
+            ._loadRepo().then(() => {
+              const sel = element.$.submitTypeSelect;
+              assert.equal(sel.bindValue, 'INHERIT');
+              assert.equal(
+                  sel.nativeSelect.options[0].text,
+                  'Inherit (Merge if necessary)'
+              );
+              done();
+            });
+      });
 
       test('fields update and save correctly', () => {
         const configInputObj = {
diff --git a/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions_test.html b/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions_test.html
index ec5c5a5..1c894ee 100644
--- a/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions_test.html
+++ b/polygerrit-ui/app/elements/change/gr-change-actions/gr-change-actions_test.html
@@ -1454,14 +1454,17 @@
               'navigateToChange').returns(Promise.resolve(true));
         });
 
-        test('change action', () => element
-            ._send('DELETE', payload, '/endpoint', false, cleanup)
-            .then(() => {
-              assert.isFalse(onShowError.called);
-              assert.isTrue(cleanup.calledOnce);
-              assert.isTrue(sendStub.calledWith(42, 'DELETE', '/endpoint',
-                  null, payload));
-            }));
+        test('change action', done => {
+          element
+              ._send('DELETE', payload, '/endpoint', false, cleanup)
+              .then(() => {
+                assert.isFalse(onShowError.called);
+                assert.isTrue(cleanup.calledOnce);
+                assert.isTrue(sendStub.calledWith(42, 'DELETE', '/endpoint',
+                    null, payload));
+                done();
+              });
+        });
 
         suite('show revert submission dialog', () => {
           setup(() => {
@@ -1545,14 +1548,17 @@
           });
         });
 
-        test('revision action', () => element
-            ._send('DELETE', payload, '/endpoint', true, cleanup)
-            .then(() => {
-              assert.isFalse(onShowError.called);
-              assert.isTrue(cleanup.calledOnce);
-              assert.isTrue(sendStub.calledWith(42, 'DELETE', '/endpoint',
-                  12, payload));
-            }));
+        test('revision action', done => {
+          element
+              ._send('DELETE', payload, '/endpoint', true, cleanup)
+              .then(() => {
+                assert.isFalse(onShowError.called);
+                assert.isTrue(cleanup.calledOnce);
+                assert.isTrue(sendStub.calledWith(42, 'DELETE', '/endpoint',
+                    12, payload));
+                done();
+              });
+        });
       });
 
       suite('failure modes', () => {
diff --git a/polygerrit-ui/app/elements/edit/gr-edit-controls/gr-edit-controls_test.html b/polygerrit-ui/app/elements/edit/gr-edit-controls/gr-edit-controls_test.html
index 8ef561c..277bb78 100644
--- a/polygerrit-ui/app/elements/edit/gr-edit-controls/gr-edit-controls_test.html
+++ b/polygerrit-ui/app/elements/edit/gr-edit-controls/gr-edit-controls_test.html
@@ -336,12 +336,16 @@
     });
   });
 
-  test('openOpenDialog', () => element.openOpenDialog('test/path.cpp')
-      .then(() => {
-        assert.isFalse(element.$.openDialog.hasAttribute('hidden'));
-        assert.equal(element.$.openDialog.querySelector('gr-autocomplete').text,
-            'test/path.cpp');
-      }));
+  test('openOpenDialog', done => {
+    element.openOpenDialog('test/path.cpp')
+        .then(() => {
+          assert.isFalse(element.$.openDialog.hasAttribute('hidden'));
+          assert.equal(
+              element.$.openDialog.querySelector('gr-autocomplete').text,
+              'test/path.cpp');
+          done();
+        });
+  });
 
   test('_getDialogFromEvent', () => {
     const spy = sandbox.spy(element, '_getDialogFromEvent');
diff --git a/polygerrit-ui/app/elements/plugins/gr-popup-interface/gr-plugin-popup_test.html b/polygerrit-ui/app/elements/plugins/gr-popup-interface/gr-plugin-popup_test.html
index 8eabe2a..e6f446b 100644
--- a/polygerrit-ui/app/elements/plugins/gr-popup-interface/gr-plugin-popup_test.html
+++ b/polygerrit-ui/app/elements/plugins/gr-popup-interface/gr-plugin-popup_test.html
@@ -56,9 +56,12 @@
       assert.isOk(element);
     });
 
-    test('open uses open() from gr-overlay', () => element.open().then(() => {
-      assert.isTrue(element.$.overlay.open.called);
-    }));
+    test('open uses open() from gr-overlay', done => {
+      element.open().then(() => {
+        assert.isTrue(element.$.overlay.open.called);
+        done();
+      });
+    });
 
     test('close uses close() from gr-overlay', () => {
       element.close();
diff --git a/polygerrit-ui/app/elements/plugins/gr-popup-interface/gr-popup-interface_test.html b/polygerrit-ui/app/elements/plugins/gr-popup-interface/gr-popup-interface_test.html
index af3d770..55b7ac5 100644
--- a/polygerrit-ui/app/elements/plugins/gr-popup-interface/gr-popup-interface_test.html
+++ b/polygerrit-ui/app/elements/plugins/gr-popup-interface/gr-popup-interface_test.html
@@ -69,22 +69,28 @@
         instance = new GrPopupInterface(plugin);
       });
 
-      test('open', () => instance.open().then(api => {
-        assert.strictEqual(api, instance);
-        const manual = document.createElement('div');
-        manual.id = 'foobar';
-        manual.innerHTML = 'manual content';
-        api._getElement().appendChild(manual);
-        flushAsynchronousOperations();
-        assert.equal(
-            container.querySelector('#foobar').textContent, 'manual content');
-      }));
+      test('open', done => {
+        instance.open().then(api => {
+          assert.strictEqual(api, instance);
+          const manual = document.createElement('div');
+          manual.id = 'foobar';
+          manual.innerHTML = 'manual content';
+          api._getElement().appendChild(manual);
+          flushAsynchronousOperations();
+          assert.equal(
+              container.querySelector('#foobar').textContent, 'manual content');
+          done();
+        });
+      });
 
-      test('close', () => instance.open().then(api => {
-        assert.isTrue(api._getElement().node.opened);
-        api.close();
-        assert.isFalse(api._getElement().node.opened);
-      }));
+      test('close', done => {
+        instance.open().then(api => {
+          assert.isTrue(api._getElement().node.opened);
+          api.close();
+          assert.isFalse(api._getElement().node.opened);
+          done();
+        });
+      });
     });
 
     suite('components', () => {
@@ -92,16 +98,22 @@
         instance = new GrPopupInterface(plugin, 'gr-user-test-popup');
       });
 
-      test('open', () => instance.open().then(api => {
-        assert.isNotNull(
-            Polymer.dom(container).querySelector('gr-user-test-popup'));
-      }));
+      test('open', done => {
+        instance.open().then(api => {
+          assert.isNotNull(
+              Polymer.dom(container).querySelector('gr-user-test-popup'));
+          done();
+        });
+      });
 
-      test('close', () => instance.open().then(api => {
-        assert.isTrue(api._getElement().node.opened);
-        api.close();
-        assert.isFalse(api._getElement().node.opened);
-      }));
+      test('close', done => {
+        instance.open().then(api => {
+          assert.isTrue(api._getElement().node.opened);
+          api.close();
+          assert.isFalse(api._getElement().node.opened);
+          done();
+        });
+      });
     });
   });
 </script>
diff --git a/polygerrit-ui/app/elements/shared/gr-repo-branch-picker/gr-repo-branch-picker_test.html b/polygerrit-ui/app/elements/shared/gr-repo-branch-picker/gr-repo-branch-picker_test.html
index adc4f68..3bad2a9 100644
--- a/polygerrit-ui/app/elements/shared/gr-repo-branch-picker/gr-repo-branch-picker_test.html
+++ b/polygerrit-ui/app/elements/shared/gr-repo-branch-picker/gr-repo-branch-picker_test.html
@@ -126,16 +126,19 @@
             });
       });
 
-      test('does not query when repo is unset', () => element
-          ._getRepoBranchesSuggestions('')
-          .then(() => {
-            assert.isFalse(element.$.restAPI.getRepoBranches.called);
-            element.repo = 'gerrit';
-            return element._getRepoBranchesSuggestions('');
-          })
-          .then(() => {
-            assert.isTrue(element.$.restAPI.getRepoBranches.called);
-          }));
+      test('does not query when repo is unset', done => {
+        element
+            ._getRepoBranchesSuggestions('')
+            .then(() => {
+              assert.isFalse(element.$.restAPI.getRepoBranches.called);
+              element.repo = 'gerrit';
+              return element._getRepoBranchesSuggestions('');
+            })
+            .then(() => {
+              assert.isTrue(element.$.restAPI.getRepoBranches.called);
+              done();
+            });
+      });
     });
   });
 </script>