diff --git a/com.ibm.wala.cast.java.test/src/com/ibm/wala/cast/java/test/IRTests.java b/com.ibm.wala.cast.java.test/src/com/ibm/wala/cast/java/test/IRTests.java
index f9a530d6d..36862b63b 100644
--- a/com.ibm.wala.cast.java.test/src/com/ibm/wala/cast/java/test/IRTests.java
+++ b/com.ibm.wala.cast.java.test/src/com/ibm/wala/cast/java/test/IRTests.java
@@ -261,8 +261,8 @@ public abstract class IRTests extends WalaTestCase {
     }
   }
 
-  protected Collection<String> singleTestSrc() {
-    return Collections.singletonList(getTestSrcPath() + File.separator + singleJavaInputForTest());
+  protected Collection<String> singleTestSrc(final String folder) {
+    return Collections.singletonList(getTestSrcPath() + File.separator + folder + File.separator + singleJavaInputForTest());
   }
 
   protected Collection<String> singlePkgTestSrc(String pkgName) {