diff --git a/karma.conf.ts b/karma.conf.ts
index da215d038..5b3106254 100644
--- a/karma.conf.ts
+++ b/karma.conf.ts
@@ -22,6 +22,7 @@ module.exports = config => {
     },
 
     browserify: {
+      debug: true,
       plugin: [ 'tsify' ],
       extensions: ['.js', '.ts']
     },
diff --git a/test/plugin.spec.ts b/test/plugin.spec.ts
index 8109e5cf2..ecdb07a74 100644
--- a/test/plugin.spec.ts
+++ b/test/plugin.spec.ts
@@ -3,7 +3,7 @@
 import 'es6-shim';
 import {Plugin, Cordova} from './../src/plugins/plugin';
 
-declare const window: any;
+declare let window: any;
 window.plugins = {
   test: {}
 };
diff --git a/test/plugins/mixpanel.spec.ts b/test/plugins/mixpanel.spec.ts
deleted file mode 100644
index 7eb43d0b4..000000000
--- a/test/plugins/mixpanel.spec.ts
+++ /dev/null
@@ -1,28 +0,0 @@
-import {Mixpanel} from '../../src/plugins/mixpanel';
-declare const window: any;
-
-window.mixpanel = {
-  people: {
-    identify: (args, success, error) => success('Success')
-  }
-};
-
-describe('Mixpanel', () => {
-
-  it('should return MixpanelPeople', () => {
-    expect(Mixpanel.people).toBeDefined();
-    expect(Mixpanel.people.identify).toBeDefined();
-  });
-
-  it('should call a method of MixpanelPeople', (done) => {
-    const spy = spyOn(window.mixpanel.people, 'identify').and.callThrough();
-    Mixpanel.people.identify('veryDistinctSuchIdVeryWow')
-      .then(result => {
-        expect(result).toEqual('Success');
-        done();
-      });
-    expect(spy.calls.mostRecent().args[0]).toEqual('veryDistinctSuchIdVeryWow');
-    expect(window.mixpanel.people.identify).toHaveBeenCalled();
-  });
-
-});