diff --git a/plugins/explore/src/components/GroupsExplorerContent/GroupsDiagram.test.tsx b/plugins/explore/src/components/GroupsExplorerContent/GroupsDiagram.test.tsx
new file mode 100644
index 0000000000..022387faca
--- /dev/null
+++ b/plugins/explore/src/components/GroupsExplorerContent/GroupsDiagram.test.tsx
@@ -0,0 +1,69 @@
+/*
+ * 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 { ApiProvider, ApiRegistry } from '@backstage/core';
+import {
+  catalogApiRef,
+  CatalogApi,
+  entityRouteRef,
+} from '@backstage/plugin-catalog-react';
+import { Entity } from '@backstage/catalog-model';
+import { renderInTestApp } from '@backstage/test-utils';
+import React from 'react';
+import { GroupsDiagram } from './GroupsDiagram';
+
+describe('<GroupsDiagram />', () => {
+  beforeAll(() => {
+    Object.defineProperty(window.SVGElement.prototype, 'getBBox', {
+      value: () => ({ width: 100, height: 100 }),
+      configurable: true,
+    });
+  });
+
+  it('shows groups', async () => {
+    const catalogApi: Partial<CatalogApi> = {
+      getEntities: () =>
+        Promise.resolve({
+          items: [
+            {
+              apiVersion: 'backstage.io/v1alpha1',
+              kind: 'Group',
+              metadata: {
+                name: 'group-a',
+                namespace: 'my-namespace',
+              },
+              spec: {
+                type: 'organization',
+              },
+            },
+          ] as Entity[],
+        }),
+    };
+
+    const { getByText } = await renderInTestApp(
+      <ApiProvider apis={ApiRegistry.from([[catalogApiRef, catalogApi]])}>
+        <GroupsDiagram />
+      </ApiProvider>,
+      {
+        mountedRoutes: {
+          '/catalog/:namespace/:kind/:name': entityRouteRef,
+        },
+      },
+    );
+
+    expect(getByText('my-namespace/group-a')).toBeInTheDocument();
+  });
+});
diff --git a/plugins/explore/src/components/GroupsExplorerContent/GroupsExplorerContent.test.tsx b/plugins/explore/src/components/GroupsExplorerContent/GroupsExplorerContent.test.tsx
new file mode 100644
index 0000000000..38c4678d5a
--- /dev/null
+++ b/plugins/explore/src/components/GroupsExplorerContent/GroupsExplorerContent.test.tsx
@@ -0,0 +1,103 @@
+/*
+ * 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 { Entity } from '@backstage/catalog-model';
+import { ApiProvider, ApiRegistry } from '@backstage/core';
+import { catalogApiRef, entityRouteRef } from '@backstage/plugin-catalog-react';
+import { renderInTestApp } from '@backstage/test-utils';
+import { waitFor } from '@testing-library/react';
+import React from 'react';
+import { GroupsExplorerContent } from '../GroupsExplorerContent';
+
+describe('<GroupsExplorerContent />', () => {
+  const catalogApi: jest.Mocked<typeof catalogApiRef.T> = {
+    addLocation: jest.fn(_a => new Promise(() => {})),
+    getEntities: jest.fn(),
+    getOriginLocationByEntity: jest.fn(),
+    getLocationByEntity: jest.fn(),
+    getLocationById: jest.fn(),
+    removeLocationById: jest.fn(),
+    removeEntityByUid: jest.fn(),
+    getEntityByName: jest.fn(),
+  };
+
+  const Wrapper = ({ children }: { children?: React.ReactNode }) => (
+    <ApiProvider apis={ApiRegistry.with(catalogApiRef, catalogApi)}>
+      {children}
+    </ApiProvider>
+  );
+
+  beforeEach(() => {
+    jest.resetAllMocks();
+
+    Object.defineProperty(window.SVGElement.prototype, 'getBBox', {
+      value: () => ({ width: 100, height: 100 }),
+      configurable: true,
+    });
+  });
+
+  it('renders a groups diagram', async () => {
+    const entities: Entity[] = [
+      {
+        apiVersion: 'backstage.io/v1alpha1',
+        kind: 'Group',
+        metadata: {
+          name: 'group-a',
+          namespace: 'my-namespace',
+        },
+        spec: {
+          type: 'organization',
+        },
+      },
+    ];
+    catalogApi.getEntities.mockResolvedValue({ items: entities });
+
+    const { getByText } = await renderInTestApp(
+      <Wrapper>
+        <GroupsExplorerContent />
+      </Wrapper>,
+      {
+        mountedRoutes: {
+          '/catalog/:namespace/:kind/:name': entityRouteRef,
+        },
+      },
+    );
+
+    await waitFor(() => {
+      expect(getByText('my-namespace/group-a')).toBeInTheDocument();
+    });
+  });
+
+  it('renders a friendly error if it cannot collect domains', async () => {
+    const catalogError = new Error('Network timeout');
+    catalogApi.getEntities.mockRejectedValueOnce(catalogError);
+
+    const { getByText } = await renderInTestApp(
+      <Wrapper>
+        <GroupsExplorerContent />
+      </Wrapper>,
+      {
+        mountedRoutes: {
+          '/catalog/:namespace/:kind/:name': entityRouteRef,
+        },
+      },
+    );
+
+    await waitFor(() =>
+      expect(getByText(/Warning: Network timeout/)).toBeInTheDocument(),
+    );
+  });
+});