diff --git a/common/implementation/src/test/java/registry/RegistryTest.java b/common/implementation/src/test/java/registry/RegistryTest.java
new file mode 100644
index 000000000..dbebb3c98
--- /dev/null
+++ b/common/implementation/src/test/java/registry/RegistryTest.java
@@ -0,0 +1,54 @@
+package registry;
+
+import com.dfsek.terra.api.registry.CheckedRegistry;
+import com.dfsek.terra.api.registry.OpenRegistry;
+
+import com.dfsek.terra.api.registry.exception.DuplicateEntryException;
+import com.dfsek.terra.registry.CheckedRegistryImpl;
+import com.dfsek.terra.registry.OpenRegistryImpl;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+
+public class RegistryTest {
+    @Test
+    public void openRegistry() {
+        OpenRegistry<String> test = new OpenRegistryImpl<>();
+        
+        test.register("test", "bazinga");
+        
+        assertEquals(test.get("test"), "bazinga");
+    }
+    
+    @Test
+    public void openRegistryChecked() {
+        OpenRegistry<String> test = new OpenRegistryImpl<>();
+    
+        test.registerChecked("test", "bazinga");
+        
+        try {
+            test.registerChecked("test", "bazinga2");
+            fail("Shouldn't be able to re-register with #registerChecked!");
+        } catch(DuplicateEntryException ignore) {
+        
+        }
+    }
+    
+    @Test
+    public void checkedRegistry() {
+        CheckedRegistry<String> test = new CheckedRegistryImpl<>(new OpenRegistryImpl<>());
+        
+        test.register("test", "bazinga");
+    
+        assertEquals(test.get("test"), "bazinga");
+        
+        try {
+            test.register("test", "bazinga2");
+            fail("Shouldn't be able to re-register in CheckedRegistry!");
+        } catch(DuplicateEntryException ignore) {
+        
+        }
+    }
+}