diff --git a/maven-core/src/test/java/org/apache/maven/plugin/PluginParameterExpressionEvaluatorTest.java b/maven-core/src/test/java/org/apache/maven/plugin/PluginParameterExpressionEvaluatorTest.java
index ac8557b070..2666302cb1 100644
--- a/maven-core/src/test/java/org/apache/maven/plugin/PluginParameterExpressionEvaluatorTest.java
+++ b/maven-core/src/test/java/org/apache/maven/plugin/PluginParameterExpressionEvaluatorTest.java
@@ -57,6 +57,8 @@ import java.util.Properties;
 public class PluginParameterExpressionEvaluatorTest
     extends PlexusTestCase
 {
+    private static final String FS = System.getProperty( "file.separator" );
+
     public void testValueExtractionWithAPomValueContainingAPath()
         throws Exception
     {
@@ -254,7 +256,7 @@ public class PluginParameterExpressionEvaluatorTest
         ExpressionEvaluator expressionEvaluator =
             createExpressionEvaluator( new MavenProject( model ), null, new Properties() );
 
-        Object value = expressionEvaluator.evaluate( "${project.build.directory}/${project.build.finalName}" );
+        Object value = expressionEvaluator.evaluate( "${project.build.directory}" + FS + "${project.build.finalName}" );
 
         assertEquals( new File( "expected-directory/expected-finalName" ).getCanonicalPath(), value );
     }