diff --git a/maven-plugin-testing-harness/src/main/java/org/apache/maven/plugin/testing/ResolverExpressionEvaluatorStub.java b/maven-plugin-testing-harness/src/main/java/org/apache/maven/plugin/testing/ResolverExpressionEvaluatorStub.java
index 6fc6953..623d614 100644
--- a/maven-plugin-testing-harness/src/main/java/org/apache/maven/plugin/testing/ResolverExpressionEvaluatorStub.java
+++ b/maven-plugin-testing-harness/src/main/java/org/apache/maven/plugin/testing/ResolverExpressionEvaluatorStub.java
@@ -128,7 +128,13 @@ public class ResolverExpressionEvaluatorStub
         {
             return file;
         }
-
-        return new File( PlexusTestCase.getBasedir() + File.pathSeparator + file.getPath() );
+        else if ( file.isAbsolute() )
+        {
+            return file;
+        }
+        else
+        {
+            return new File( PlexusTestCase.getBasedir(), file.getPath() );
+        }
     }
 }