diff --git a/maven-surefire-common/src/main/java/org/apache/maven/plugin/surefire/booterclient/DefaultForkConfiguration.java b/maven-surefire-common/src/main/java/org/apache/maven/plugin/surefire/booterclient/DefaultForkConfiguration.java
index 8ffb868a01..b70abd75f1 100644
--- a/maven-surefire-common/src/main/java/org/apache/maven/plugin/surefire/booterclient/DefaultForkConfiguration.java
+++ b/maven-surefire-common/src/main/java/org/apache/maven/plugin/surefire/booterclient/DefaultForkConfiguration.java
@@ -253,7 +253,7 @@ private String interpolateArgLineWithPropertyExpressions()
     @Nonnull
     private static String stripWhitespace( @Nonnull String argLine )
     {
-        return argLine.replaceAll( "\\s+", " " );
+        return argLine.replaceAll( "\\s", " " );
     }
 
     /**
diff --git a/maven-surefire-common/src/test/java/org/apache/maven/plugin/surefire/booterclient/DefaultForkConfigurationTest.java b/maven-surefire-common/src/test/java/org/apache/maven/plugin/surefire/booterclient/DefaultForkConfigurationTest.java
index 90c258d1b2..ad668856e9 100644
--- a/maven-surefire-common/src/test/java/org/apache/maven/plugin/surefire/booterclient/DefaultForkConfigurationTest.java
+++ b/maven-surefire-common/src/test/java/org/apache/maven/plugin/surefire/booterclient/DefaultForkConfigurationTest.java
@@ -248,8 +248,8 @@ protected void resolveClasspath( @Nonnull Commandline cli,
         DefaultForkConfiguration mockedConfig = spy( config );
         String newArgLine = invokeMethod( mockedConfig, "newJvmArgLine", new Class[] { int.class }, 2 );
         verifyPrivate( mockedConfig, times( 1 ) ).invoke( "interpolateArgLineWithPropertyExpressions" );
-        verifyPrivate( mockedConfig, times( 1 ) ).invoke( "extendJvmArgLine", eq( "a b" ) );
-        assertThat( newArgLine ).isEqualTo( "a b" );
+        verifyPrivate( mockedConfig, times( 1 ) ).invoke( "extendJvmArgLine", eq( "a  b" ) );
+        assertThat( newArgLine ).isEqualTo( "a  b" );
     }
 
     @Test