diff --git a/src/test/java/schule/ngb/zm/util/FakerTest.java b/src/test/java/schule/ngb/zm/util/FakerTest.java
new file mode 100644
index 0000000..e7a445e
--- /dev/null
+++ b/src/test/java/schule/ngb/zm/util/FakerTest.java
@@ -0,0 +1,31 @@
+package schule.ngb.zm.util;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.LinkedList;
+
+import schule.ngb.zm.util.abi.List;
+import schule.ngb.zm.util.abi.Queue;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class FakerTest {
+
+	@Test
+	void fakeIntegers() {
+		LinkedList<Integer> l = new LinkedList<>();
+		Faker.fakeIntegers(100, 0, 100, l::add);
+		assertEquals(100, l.size());
+
+		LinkedList<Integer> intList = Faker.fakeIntegers(100, 0, 100, LinkedList::new, (list, i) -> list.add(i));
+		assertEquals(100, intList.size());
+
+		List<Integer> abiList = Faker.fakeIntegers(100, 0, 100, List::new, (list, i) -> list.append(i));
+		assertFalse(abiList.isEmpty());
+
+		Queue<Integer> abiQueue = new Queue<>();
+		Faker.fakeIntegers(100, 0, 100, abiQueue::enqueue);
+		assertFalse(abiQueue.isEmpty());
+	}
+
+}
diff --git a/src/test/java/schule/ngb/zm/util/ValidatorTest.java b/src/test/java/schule/ngb/zm/util/ValidatorTest.java
index 413399b..569d297 100644
--- a/src/test/java/schule/ngb/zm/util/ValidatorTest.java
+++ b/src/test/java/schule/ngb/zm/util/ValidatorTest.java
@@ -11,14 +11,14 @@ class ValidatorTest {
 		StringBuilder sb = new StringBuilder("Message");
 
 		Object o1 = new Object();
-		assertEquals(o1, Validator.requireNotNull(o1));
-		assertEquals(o1, Validator.requireNotNull(o1, "Message"));
-		assertEquals(o1, Validator.requireNotNull(o1, sb));
+		assertEquals(o1, Validator.requireNotNull(o1, "content"));
+		assertEquals(o1, Validator.requireNotNull(o1, "content", "Message"));
+		assertEquals(o1, Validator.requireNotNull(o1, "content", sb));
 		assertEquals(o1, Validator.requireNotNull(o1, ()->"Message"));
 
 		String o2 = null;
-		assertThrowsExactly(NullPointerException.class, () -> Validator.requireNotNull(o2));
-		assertThrowsExactly(NullPointerException.class, () -> Validator.requireNotNull(o2, "Message"));
+		assertThrowsExactly(NullPointerException.class, () -> Validator.requireNotNull(o2, "content"));
+		assertThrowsExactly(NullPointerException.class, () -> Validator.requireNotNull(o2, "content", "Message"));
 		assertThrowsExactly(NullPointerException.class, () -> Validator.requireNotNull(o2, ()->"Message"));
 	}
 
@@ -27,14 +27,14 @@ class ValidatorTest {
 		StringBuilder sb = new StringBuilder("Message");
 
 		String s1 = "Content";
-		assertEquals(s1, Validator.requireNotEmpty(s1));
-		assertEquals(s1, Validator.requireNotEmpty(s1, "Message"));
-		assertEquals(s1, Validator.requireNotEmpty(s1, sb));
+		assertEquals(s1, Validator.requireNotEmpty(s1, "content"));
+		assertEquals(s1, Validator.requireNotEmpty(s1, "content", "Message"));
+		assertEquals(s1, Validator.requireNotEmpty(s1, "content", sb));
 		assertEquals(s1, Validator.requireNotEmpty(s1, ()->"Message"));
 
 		String s2 = "";
-		assertThrowsExactly(IllegalArgumentException.class, () -> Validator.requireNotEmpty(s2));
-		assertThrowsExactly(IllegalArgumentException.class, () -> Validator.requireNotEmpty(s2, "Message"));
+		assertThrowsExactly(IllegalArgumentException.class, () -> Validator.requireNotEmpty(s2, "content"));
+		assertThrowsExactly(IllegalArgumentException.class, () -> Validator.requireNotEmpty(s2, "content", "Message"));
 		assertThrowsExactly(IllegalArgumentException.class, () -> Validator.requireNotEmpty(s2, ()->"Message"));
 
 	}