diff --git a/test/specs/commands/view/CommandAbstract.js b/test/specs/commands/view/CommandAbstract.js
deleted file mode 100644
index e9c1e38dc..000000000
--- a/test/specs/commands/view/CommandAbstract.js
+++ /dev/null
@@ -1,60 +0,0 @@
-import CommandAbstract from 'commands/view/CommandAbstract';
-import Editor from 'editor/model/Editor';
-
-describe('CommandAbstract', () => {
-  let editor, editorTriggerSpy, command;
-
-  beforeEach(() => {
-    editor = new Editor();
-    editorTriggerSpy = sinon.spy(editor, 'trigger');
-
-    command = new CommandAbstract();
-    command.id = 'test';
-  });
-
-  afterEach(() => {
-    command = null;
-    editorTriggerSpy = null;
-    editor = null;
-  });
-
-  test('callRun returns result when no "abort" option specified', () => {
-    const runStub = sinon.stub(command, 'run').returns('result');
-
-    const result = command.callRun(editor);
-    expect(editorTriggerSpy.callCount).toEqual(3);
-    expect(editorTriggerSpy.getCall(0).args).toEqual(['run:test:before', {}]);
-    expect(editorTriggerSpy.getCall(1).args).toEqual(['run:test', 'result', {}]);
-    expect(editorTriggerSpy.getCall(2).args).toEqual(['run', 'test', 'result', {}]);
-
-    expect(result).toEqual('result');
-    expect(runStub.calledOnce).toEqual(true);
-  });
-
-  test('callRun returns undefined when "abort" option is specified', () => {
-    const runStub = sinon.stub(command, 'run').returns('result');
-
-    const result = command.callRun(editor, { abort: true });
-
-    expect(editorTriggerSpy.calledTwice).toEqual(true);
-    expect(editorTriggerSpy.getCall(0).args).toEqual(['run:test:before', { abort: true }]);
-    expect(editorTriggerSpy.getCall(1).args).toEqual(['abort:test', { abort: true }]);
-
-    expect(result).toEqual(undefined);
-    expect(runStub.notCalled).toEqual(true);
-  });
-
-  test('callStop returns result', () => {
-    const stopStub = sinon.stub(command, 'stop').returns('stopped');
-
-    const result = command.callStop(editor);
-
-    expect(editorTriggerSpy.callCount).toEqual(3);
-    expect(editorTriggerSpy.getCall(0).args).toEqual(['stop:test:before', {}]);
-    expect(editorTriggerSpy.getCall(1).args).toEqual(['stop:test', 'stopped', {}]);
-    expect(editorTriggerSpy.getCall(2).args).toEqual(['stop', 'test', 'stopped', {}]);
-
-    expect(result).toEqual('stopped');
-    expect(stopStub.calledOnce).toEqual(true);
-  });
-});
diff --git a/test/specs/commands/view/CommandAbstract.ts b/test/specs/commands/view/CommandAbstract.ts
new file mode 100644
index 000000000..b05105a14
--- /dev/null
+++ b/test/specs/commands/view/CommandAbstract.ts
@@ -0,0 +1,61 @@
+import CommandAbstract from '../../../../src/commands/view/CommandAbstract';
+import Editor from '../../../../src/editor';
+
+describe('CommandAbstract', () => {
+  let editor: Editor;
+  let command: CommandAbstract;
+
+  beforeEach(() => {
+    editor = new Editor();
+    command = new CommandAbstract({});
+    command.id = 'test';
+  });
+
+  test('callRun returns result when no "abort" option specified', () => {
+    const returnValue = 'result';
+    const triggerSpy = jest.spyOn(editor, 'trigger');
+    const runSpy = jest.spyOn(command, 'run');
+    runSpy.mockReturnValue(returnValue as any);
+    const result = command.callRun(editor);
+
+    expect(triggerSpy.mock.calls.length).toBe(3);
+    expect(triggerSpy.mock.calls[0]).toEqual(['run:test:before', {}]);
+    expect(triggerSpy.mock.calls[1]).toEqual(['run:test', returnValue, {}]);
+    expect(triggerSpy.mock.calls[2]).toEqual(['run', 'test', returnValue, {}]);
+
+    expect(runSpy).toBeCalledTimes(1);
+    expect(result).toEqual(returnValue);
+  });
+
+  test('callRun returns undefined when "abort" option is specified', () => {
+    const returnValue = 'result';
+    const opts = { abort: true };
+    const triggerSpy = jest.spyOn(editor, 'trigger');
+    const runSpy = jest.spyOn(command, 'run');
+    runSpy.mockReturnValue(returnValue as any);
+    const result = command.callRun(editor, opts);
+
+    expect(triggerSpy.mock.calls.length).toBe(2);
+    expect(triggerSpy.mock.calls[0]).toEqual(['run:test:before', opts]);
+    expect(triggerSpy.mock.calls[1]).toEqual(['abort:test', opts]);
+
+    expect(runSpy).toBeCalledTimes(0);
+    expect(result).toEqual(undefined);
+  });
+
+  test('callStop returns result', () => {
+    const returnValue = 'stopped';
+    const triggerSpy = jest.spyOn(editor, 'trigger');
+    const runSpy = jest.spyOn(command, 'stop');
+    runSpy.mockReturnValue(returnValue as any);
+    const result = command.callStop(editor);
+
+    expect(triggerSpy.mock.calls.length).toBe(3);
+    expect(triggerSpy.mock.calls[0]).toEqual(['stop:test:before', {}]);
+    expect(triggerSpy.mock.calls[1]).toEqual(['stop:test', returnValue, {}]);
+    expect(triggerSpy.mock.calls[2]).toEqual(['stop', 'test', returnValue, {}]);
+
+    expect(runSpy).toBeCalledTimes(1);
+    expect(result).toEqual(returnValue);
+  });
+});