diff --git a/plugins/org.eclipse.viatra.modelobfuscator.tests/src/org/eclipse/viatra/modelobfuscator/tests/SimpleEMFModelObfuscatorTest.xtend b/plugins/org.eclipse.viatra.modelobfuscator.tests/src/org/eclipse/viatra/modelobfuscator/tests/SimpleEMFModelObfuscatorTest.xtend
index cdfe193..a6c9f14 100644
--- a/plugins/org.eclipse.viatra.modelobfuscator.tests/src/org/eclipse/viatra/modelobfuscator/tests/SimpleEMFModelObfuscatorTest.xtend
+++ b/plugins/org.eclipse.viatra.modelobfuscator.tests/src/org/eclipse/viatra/modelobfuscator/tests/SimpleEMFModelObfuscatorTest.xtend
@@ -51,7 +51,7 @@
 
     printProcessModel(process)
 
-    val obfuscator = EMFModelObfuscatorBuilder.create.setInput(rs).build
+    val obfuscator = EMFModelObfuscatorBuilder.create.setInput(rs).setSalt("").setPrefix("").build
     println("Seed: " + obfuscator.stringObfuscator.seed)
     obfuscator.obfuscate
 
diff --git a/plugins/org.eclipse.viatra.modelobfuscator.tests/src/org/eclipse/viatra/modelobfuscator/tests/SimpleUMLObfuscatorTest.xtend b/plugins/org.eclipse.viatra.modelobfuscator.tests/src/org/eclipse/viatra/modelobfuscator/tests/SimpleUMLObfuscatorTest.xtend
index 3e4c43f..5e51e4e 100644
--- a/plugins/org.eclipse.viatra.modelobfuscator.tests/src/org/eclipse/viatra/modelobfuscator/tests/SimpleUMLObfuscatorTest.xtend
+++ b/plugins/org.eclipse.viatra.modelobfuscator.tests/src/org/eclipse/viatra/modelobfuscator/tests/SimpleUMLObfuscatorTest.xtend
@@ -46,7 +46,7 @@
 
     printUMLModel(model)
 
-    val obfuscator = UMLObfuscatorBuilder.create.setInput(rs).build
+    val obfuscator = UMLObfuscatorBuilder.create.setInput(rs).setSalt("").setPrefix("").build
     println("Seed: " + obfuscator.stringObfuscator.seed)
     obfuscator.obfuscate