diff --git a/tools/mascot/src/test/java/dk/alexandra/fresco/tools/mascot/TestMascotResourcePoolImpl.java b/tools/mascot/src/test/java/dk/alexandra/fresco/tools/mascot/TestMascotResourcePoolImpl.java
index 08c241c5c..63ee3dc7a 100644
--- a/tools/mascot/src/test/java/dk/alexandra/fresco/tools/mascot/TestMascotResourcePoolImpl.java
+++ b/tools/mascot/src/test/java/dk/alexandra/fresco/tools/mascot/TestMascotResourcePoolImpl.java
@@ -3,16 +3,17 @@
 import dk.alexandra.fresco.framework.builder.numeric.field.BigIntegerFieldDefinition;
 import dk.alexandra.fresco.framework.util.AesCtrDrbg;
 import dk.alexandra.fresco.framework.util.ModulusFinder;
-import java.util.Map;
 import org.junit.Test;
 
+import java.util.HashMap;
+
 public class TestMascotResourcePoolImpl {
 
 
   @Test(expected = IllegalArgumentException.class)
   public void testCreateRotForSelf() {
     MascotResourcePool resourcePool = new MascotResourcePoolImpl(1, 1, 1,
-        new AesCtrDrbg(new byte[32]), Map.of(), new MascotSecurityParameters(),
+        new AesCtrDrbg(new byte[32]), new HashMap<>(), new MascotSecurityParameters(),
         new BigIntegerFieldDefinition(ModulusFinder.findSuitableModulus(128)));
     resourcePool.createRot(1, null);
   }