diff --git a/src/test/java/catering/inventory/InventoryControllerIntegrationTests.java b/src/test/java/catering/inventory/InventoryControllerIntegrationTests.java
index 8e702c5..fd21002 100644
--- a/src/test/java/catering/inventory/InventoryControllerIntegrationTests.java
+++ b/src/test/java/catering/inventory/InventoryControllerIntegrationTests.java
@@ -19,6 +19,7 @@ package catering.inventory;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.tuple;
 import static org.hamcrest.CoreMatchers.containsString;
+import static org.hamcrest.CoreMatchers.not;
 import static org.hamcrest.CoreMatchers.endsWith;
 import static org.salespointframework.core.Currencies.EURO;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
@@ -159,6 +160,42 @@ class InventoryControllerIntegrationTests {
 						Money.of(0.01, EURO), hasPromotionPrice ? null : Money.of(0.01, EURO));
 	}
 
+	@Test
+	@WithMockUser(username = "admin", roles = "ADMIN")
+	void invalidAddReturnsNiceError() throws Exception {
+		mvc.perform(post("/inventory/add")
+				.param("type", "CONSUMABLE")
+				.param("name", "")
+				.param("quantity", "10")
+				.param("wholesalePrice", "1.00")
+				.param("retailPrice", "2.00"))
+				.andExpect(content().string(containsString("Ungültiger Name")));
+	}
+
+	@Test
+	@WithMockUser(username = "admin", roles = "ADMIN")
+	void missingRetailPriceIsNoError() throws Exception {
+		mvc.perform(post("/inventory/add")
+				.param("type", "CONSUMABLE")
+				.param("name", "MOCK")
+				.param("quantity", "10")
+				.param("wholesalePrice", "1.00")
+				.param("retailPrice", "2.00"))
+				.andExpect(content().string(not(containsString("Ungültiger Angebotspreis"))));
+	}
+
+	@Test
+	@WithMockUser(username = "admin", roles = "ADMIN")
+	void invalidEditReturnsNiceError() throws Exception {
+		mvc.perform(post("/inventory/edit/" + anyPid)
+				.param("type", "CONSUMABLE")
+				.param("name", "")
+				.param("quantity", "10")
+				.param("wholesalePrice", "1.00")
+				.param("retailPrice", "2.00"))
+				.andExpect(content().string(containsString("Ungültiger Name")));
+	}
+
 	/**
 	 * Helper function for asserting that protected endpoints are not accessible by
 	 * unauthentificated users.