diff --git a/test/de/inetsoftware/jwebassembly/ScriptEngine.java b/test/de/inetsoftware/jwebassembly/ScriptEngine.java
index 81acc47..e584f89 100644
--- a/test/de/inetsoftware/jwebassembly/ScriptEngine.java
+++ b/test/de/inetsoftware/jwebassembly/ScriptEngine.java
@@ -27,10 +27,20 @@ public enum ScriptEngine {
     NodeWat,
     SpiderMonkeyWat,
     Wat2Wasm,
-    SpiderMonkeyGC,
-    SpiderMonkeyWatGC,
+    SpiderMonkeyGC(true),
+    SpiderMonkeyWatGC(true),
     ;
 
+    public final String useGC;
+
+    private ScriptEngine() {
+        this.useGC = null;
+    }
+
+    private ScriptEngine( boolean useGC ) {
+        this.useGC = Boolean.toString( useGC );
+    }
+
     public static ScriptEngine[] testEngines() {
         ScriptEngine[] val = { //
                         SpiderMonkey, //
diff --git a/test/de/inetsoftware/jwebassembly/WasmRule.java b/test/de/inetsoftware/jwebassembly/WasmRule.java
index 936953e..67c854f 100644
--- a/test/de/inetsoftware/jwebassembly/WasmRule.java
+++ b/test/de/inetsoftware/jwebassembly/WasmRule.java
@@ -485,6 +485,7 @@ public class WasmRule extends TemporaryFolder {
                 writeJsonTestData( Collections.singletonMap( methodName, params ) );
             }
 
+            compiler.setProperty( JWebAssembly.WASM_USE_GC, script.useGC );
             processBuilder = createCommand( script );
             processBuilder.directory( getRoot() );
             Process process = processBuilder.start();
@@ -540,7 +541,6 @@ public class WasmRule extends TemporaryFolder {
                 if( binary ) {
                     if( spiderMonkeyScriptGC == null ) {
                         File file = newFile( "spiderMonkeyGC.wasm" );
-                        compiler.setProperty( JWebAssembly.WASM_USE_GC, "true" );
                         compiler.compileToBinary( file );
                         spiderMonkeyScriptGC = createScript( "SpiderMonkeyTest.js", "{test.wasm}", file.getName() );
                     }
@@ -548,7 +548,6 @@ public class WasmRule extends TemporaryFolder {
                 } else {
                     if( spiderMonkeyScriptWatGC == null ) {
                         File file = newFile( "spiderMonkeyGC.wat" );
-                        compiler.setProperty( JWebAssembly.WASM_USE_GC, "true" );
                         compiler.compileToText( file );
                         spiderMonkeyScriptWatGC = createScript( "SpiderMonkeyWatTest.js", "{test}", "spiderMonkeyGC" );
                     }
@@ -572,7 +571,6 @@ public class WasmRule extends TemporaryFolder {
                 }
             }
         } finally {
-            compiler.setProperty( JWebAssembly.WASM_USE_GC, null );
             System.clearProperty( "SpiderMonkey" );
         }
         ProcessBuilder process = new ProcessBuilder( spiderMonkey.getCommand(), script.getAbsolutePath() );