diff --git a/plugins/sentry-backend/src/service/sentry-api.test.ts b/plugins/sentry-backend/src/service/sentry-api.test.ts
index fd4c2581b5..6473c58a10 100644
--- a/plugins/sentry-backend/src/service/sentry-api.test.ts
+++ b/plugins/sentry-backend/src/service/sentry-api.test.ts
@@ -14,13 +14,7 @@
  * limitations under the License.
  */
 import { SentryApiForwarder } from './sentry-api';
-import axios from 'axios';
 
-jest.mock('axios', () => ({
-  default: {
-    post: jest.fn(),
-  },
-}));
 describe('SentryApiForwarder', () => {
   it('should generate headers based on token passed in constructor', () => {
     const forwarder = new SentryApiForwarder('testtoken');
diff --git a/plugins/sentry/dev/index.tsx b/plugins/sentry/dev/index.tsx
new file mode 100644
index 0000000000..812a5585d4
--- /dev/null
+++ b/plugins/sentry/dev/index.tsx
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2020 Spotify AB
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { createDevApp } from '@backstage/dev-utils';
+import { plugin } from '../src/plugin';
+
+createDevApp().registerPlugin(plugin).render();
diff --git a/plugins/sentry/src/components/ErrorCell/ErrorCell.test.tsx b/plugins/sentry/src/components/ErrorCell/ErrorCell.test.tsx
index 0daa36f32b..74f1501225 100644
--- a/plugins/sentry/src/components/ErrorCell/ErrorCell.test.tsx
+++ b/plugins/sentry/src/components/ErrorCell/ErrorCell.test.tsx
@@ -17,7 +17,7 @@ import { ErrorCell } from './ErrorCell';
 import React from 'react';
 import { render } from '@testing-library/react';
 import mockIssue from '../../data/sentry-issue-mock.json';
-import { ThemeProvider } from '@material-ui/styles';
+import { ThemeProvider } from '@material-ui/core';
 import { lightTheme } from '@backstage/theme';
 
 describe('Sentry error cell component', () => {
diff --git a/plugins/sentry/src/components/ErrorCell/ErrorCell.tsx b/plugins/sentry/src/components/ErrorCell/ErrorCell.tsx
index 42ab27e839..408014b790 100644
--- a/plugins/sentry/src/components/ErrorCell/ErrorCell.tsx
+++ b/plugins/sentry/src/components/ErrorCell/ErrorCell.tsx
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2020 Spotify AB
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 import React, { FC } from 'react';
 import { SentryIssue } from '../../data/sentry-issue';
 import { Link, Typography } from '@material-ui/core';
@@ -7,7 +22,7 @@ import { BackstageTheme } from '@backstage/theme';
 function stripText(text: string, maxLength: number) {
   return text.length > maxLength ? `${text.substr(0, maxLength)}...` : text;
 }
-const useStyles = makeStyles<BackstageTheme>(theme => ({
+const useStyles = makeStyles<BackstageTheme>((theme) => ({
   root: {
     minWidth: 260,
     position: 'relative',
diff --git a/plugins/sentry/src/components/SentryIssuesTable/SentryIssuesTable.test.tsx b/plugins/sentry/src/components/SentryIssuesTable/SentryIssuesTable.test.tsx
index 08159b16fc..4bd231a1e5 100644
--- a/plugins/sentry/src/components/SentryIssuesTable/SentryIssuesTable.test.tsx
+++ b/plugins/sentry/src/components/SentryIssuesTable/SentryIssuesTable.test.tsx
@@ -18,7 +18,7 @@ import { render } from '@testing-library/react';
 import SentryIssuesTable from './SentryIssuesTable';
 import { SentryIssue } from '../../data/sentry-issue';
 import mockIssue from '../../data/sentry-issue-mock.json';
-import { ThemeProvider } from '@material-ui/styles';
+import { ThemeProvider } from '@material-ui/core';
 import { lightTheme } from '@backstage/theme';
 
 describe('SentryIssuesTable', () => {
diff --git a/plugins/sentry/src/data/mock-api.ts b/plugins/sentry/src/data/mock-api.ts
index 2eab8e30df..e26cce1762 100644
--- a/plugins/sentry/src/data/mock-api.ts
+++ b/plugins/sentry/src/data/mock-api.ts
@@ -32,8 +32,7 @@ function getMockIssues(number: number): SentryIssue[] {
   return new Array(number).fill(0).map(getMockIssue);
 }
 export class MockSentryApi implements SentryApi {
-  fetchIssues(project: string, statsFor: string): Promise<SentryIssue[]> {
-    console.info('Fetching mock responses for', project, statsFor);
+  fetchIssues(): Promise<SentryIssue[]> {
     return new Promise((resolve) => {
       setTimeout(() => resolve(getMockIssues(14)), 800);
     });