diff --git a/plugins/github-release-manager/src/api/PluginApiClient.test.ts b/plugins/github-release-manager/src/api/PluginApiClient.test.ts
new file mode 100644
index 0000000000..e9db190eef
--- /dev/null
+++ b/plugins/github-release-manager/src/api/PluginApiClient.test.ts
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2021 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 { OAuthApi } from '@backstage/core';
+
+import { PluginApiClient } from './PluginApiClient';
+
+jest.mock('@backstage/integration', () => ({
+  readGitHubIntegrationConfigs: jest.fn(() => []),
+}));
+
+describe('PluginApiClient', () => {
+  it('should return the default plugin api client', () => {
+    const configApi = {
+      getOptionalConfigArray: jest.fn(),
+    } as any;
+    const githubAuthApi: OAuthApi = {
+      getAccessToken: jest.fn(),
+    };
+    const pluginApiClient = new PluginApiClient({ configApi, githubAuthApi });
+
+    expect(pluginApiClient).toMatchInlineSnapshot(`
+      PluginApiClient {
+        "baseUrl": "https://api.github.com",
+        "createRc": Object {
+          "createRef": [Function],
+          "createRelease": [Function],
+          "getComparison": [Function],
+        },
+        "githubAuthApi": Object {
+          "getAccessToken": [MockFunction],
+        },
+        "host": "github.com",
+        "patch": Object {
+          "createCherryPickCommit": [Function],
+          "createReference": [Function],
+          "createTagObject": [Function],
+          "createTempCommit": [Function],
+          "forceBranchHeadToTempCommit": [Function],
+          "merge": [Function],
+          "replaceTempCommit": [Function],
+          "updateRelease": [Function],
+        },
+        "promoteRc": Object {
+          "promoteRelease": [Function],
+        },
+      }
+    `);
+  });
+});
diff --git a/plugins/github-release-manager/src/api/serviceApiRef.test.ts b/plugins/github-release-manager/src/api/serviceApiRef.test.ts
new file mode 100644
index 0000000000..7dc22deb29
--- /dev/null
+++ b/plugins/github-release-manager/src/api/serviceApiRef.test.ts
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2021 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 { githubReleaseManagerApiRef } from './serviceApiRef';
+
+describe('githubReleaseManagerApiRef', () => {
+  it('should work', () => {
+    const result = githubReleaseManagerApiRef;
+
+    expect(result).toMatchInlineSnapshot(`
+      ApiRefImpl {
+        "config": Object {
+          "description": "Used by the GitHub Release Manager plugin to make requests",
+          "id": "plugin.github-release-manager.service",
+        },
+      }
+    `);
+  });
+});