diff --git a/doc/changelog.md b/doc/changelog.md
index 83e5b86dc..b7ef8f30c 100644
--- a/doc/changelog.md
+++ b/doc/changelog.md
@@ -15,7 +15,7 @@ Syntax: `- short text describing the change _(Your Name)_`
 - _()_
 - _()_
 - _()_
-- _()_
+- Add tests for hooks in frontend/layers _(Lukas Anton Lakits)_
 - _()_
 - _()_
 - _()_
diff --git a/frontend/src/__test_utils__/msw_handlers/plants.ts b/frontend/src/__test_utils__/msw_handlers/plants.ts
index 9ff5821fd..b4d3ca600 100644
--- a/frontend/src/__test_utils__/msw_handlers/plants.ts
+++ b/frontend/src/__test_utils__/msw_handlers/plants.ts
@@ -1,5 +1,11 @@
 import { http, HttpResponse } from 'msw';
-import { Page, PlantsSummaryDto } from '@/api_types/definitions';
+import {
+  Page,
+  PlantsSummaryDto,
+  RelationDto,
+  RelationsDto,
+  RelationType,
+} from '@/api_types/definitions';
 import { baseApiUrl } from '@/config';
 
 const allPlants: PlantsSummaryDto[] = [
@@ -20,6 +26,24 @@ const allPlants: PlantsSummaryDto[] = [
   },
 ];
 
+const allRelationPartners: RelationDto[] = [
+  {
+    id: 1,
+    relation: RelationType.Neutral,
+  },
+  {
+    id: 2,
+    relation: RelationType.Antagonist,
+  },
+];
+
+const allRelations: RelationsDto[] = [
+  {
+    id: 1,
+    relations: [allRelationPartners[0], allRelationPartners[1]],
+  },
+];
+
 export const handlers = [
   http.get(`${baseApiUrl}/api/plants/:id`, () => {
     return HttpResponse.json(allPlants[0]);
@@ -40,4 +64,13 @@ export const handlers = [
 
     return HttpResponse.json(response);
   }),
+
+  http.get(`${baseApiUrl}/api/:mapId/1/layers/plants/relations`, ({ request }) => {
+    const url = new URL(request.url);
+
+    const plantId = parseInt(url.searchParams.get('plant_id') ?? '-1');
+    return HttpResponse.json(allRelations[plantId - 1]);
+  }),
 ];
+
+export const allPlantsForTesting = allPlants;
diff --git a/frontend/src/features/map_planning/layers/plant/hooks/relationsHookApi.test.tsx b/frontend/src/features/map_planning/layers/plant/hooks/relationsHookApi.test.tsx
new file mode 100644
index 000000000..db0e4d6a4
--- /dev/null
+++ b/frontend/src/features/map_planning/layers/plant/hooks/relationsHookApi.test.tsx
@@ -0,0 +1,44 @@
+import { renderHook, screen, waitFor } from '@testing-library/react';
+import { expect } from 'vitest';
+import { mockServerErrorOnce } from '@/__test_utils__/msw';
+import '@/__test_utils__/setup';
+import '@/__test_utils__/setupSessionStorageAuth';
+import { createQueryHookWrapper } from '@/__test_utils__/utils';
+import { RelationType } from '@/api_types/definitions';
+import { useRelations } from '@/features/map_planning/layers/plant/hooks/relationsHookApi';
+
+describe('useRelations', () => {
+  const renderUseRelations = () =>
+    renderHook(
+      () =>
+        useRelations({
+          mapId: 1,
+          plantId: 1,
+          enabled: true,
+        }),
+      {
+        wrapper: createQueryHookWrapper(),
+      },
+    );
+
+  it('should return the two relations for the plant', async () => {
+    const { result } = renderUseRelations();
+
+    await waitFor(() => expect(result.current.isSuccess).toBe(true));
+    expect(result.current.data).toBeDefined();
+    expect(result.current.data?.has(1));
+    expect(result.current.data?.has(2));
+    expect(result.current.data?.get(1)?.id == 1);
+    expect(result.current.data?.get(1)?.relation == RelationType.Neutral);
+    expect(result.current.data?.get(2)?.relation == RelationType.Antagonist);
+  });
+
+  it('should cause a toast to appear on failing hook', async () => {
+    mockServerErrorOnce();
+    const { result } = renderUseRelations();
+
+    await waitFor(() => expect(result.current.isError).toBe(true));
+    expect(result.current.error).toBeDefined();
+    await screen.findByRole('alert');
+  });
+});
diff --git a/frontend/src/features/map_planning/layers/plant/hooks/useSelectPlantForPlanting.test.tsx b/frontend/src/features/map_planning/layers/plant/hooks/useSelectPlantForPlanting.test.tsx
new file mode 100644
index 000000000..3677f7e47
--- /dev/null
+++ b/frontend/src/features/map_planning/layers/plant/hooks/useSelectPlantForPlanting.test.tsx
@@ -0,0 +1,26 @@
+import { renderHook, waitFor } from '@testing-library/react';
+import { expect } from 'vitest';
+import { allPlantsForTesting } from '@/__test_utils__/msw_handlers/plants';
+import '@/__test_utils__/setup';
+import '@/__test_utils__/setupSessionStorageAuth';
+import { useSelectPlantForPlanting } from '@/features/map_planning/layers/plant/hooks/useSelectPlantForPlanting';
+import { useSelectedPlantForPlanting } from '@/features/map_planning/layers/plant/hooks/useSelectedPlantForPlanting';
+
+describe('useSelectPlantForPlanting', () => {
+  const renderUseSelectPlantForPlanting = () => renderHook(() => useSelectPlantForPlanting());
+
+  it('should set the given plant as plant for planting', async () => {
+    const { result } = renderUseSelectPlantForPlanting();
+    const plantForPlanting = allPlantsForTesting[0];
+
+    await waitFor(() =>
+      expect(
+        result.current.actions.selectPlantForPlanting({ plant: plantForPlanting, seed: null }),
+      ).toBeUndefined(),
+    );
+    const selectedPlant = renderHook(() => useSelectedPlantForPlanting());
+    expect(selectedPlant.result.current).toBeDefined();
+    expect(selectedPlant.result.current?.plant).toBe(plantForPlanting);
+    expect(selectedPlant.result.current?.seed).toBeNull();
+  });
+});