diff --git a/src/test/java/tools/RandomizerTest.java b/src/test/java/tools/RandomizerTest.java
new file mode 100644
index 0000000000..89205b225f
--- /dev/null
+++ b/src/test/java/tools/RandomizerTest.java
@@ -0,0 +1,37 @@
+package tools;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class RandomizerTest {
+
+    @Test
+    void randShouldIncludeEntireRange() {
+        Map<Integer, Integer> rands = new HashMap<>();
+
+        final int rounds = 100_000;
+        for (int i = 0; i < rounds; i++) {
+            int randomValue = Randomizer.rand(-5, 5);
+            rands.compute(randomValue, (k, v) -> v == null ? 0 : v + 1);
+        }
+
+        assertFalse(rands.containsKey(-6));
+        assertTrue(rands.containsKey(-5));
+        assertTrue(rands.containsKey(-4));
+        assertTrue(rands.containsKey(-3));
+        assertTrue(rands.containsKey(-2));
+        assertTrue(rands.containsKey(-1));
+        assertTrue(rands.containsKey(0));
+        assertTrue(rands.containsKey(1));
+        assertTrue(rands.containsKey(2));
+        assertTrue(rands.containsKey(3));
+        assertTrue(rands.containsKey(4));
+        assertTrue(rands.containsKey(5));
+        assertFalse(rands.containsKey(6));
+    }
+}