diff --git a/processor/src/main/java/org/mapstruct/ap/internal/conversion/JavaLocalDateTimeToDateConversion.java b/processor/src/main/java/org/mapstruct/ap/internal/conversion/JavaLocalDateTimeToDateConversion.java
index 40f0da5d5..70eee16f5 100644
--- a/processor/src/main/java/org/mapstruct/ap/internal/conversion/JavaLocalDateTimeToDateConversion.java
+++ b/processor/src/main/java/org/mapstruct/ap/internal/conversion/JavaLocalDateTimeToDateConversion.java
@@ -33,6 +33,6 @@ public class JavaLocalDateTimeToDateConversion extends SimpleConversion {
 
     @Override
     protected String getFromExpression(ConversionContext conversionContext) {
-        return "java.time.LocalDateTime.ofInstant( <SOURCE>.toInstant(), java.time.ZoneId.systemDefault() )";
+        return "java.time.LocalDateTime.ofInstant( <SOURCE>.toInstant(), java.time.ZoneId.of( \"UTC\" ) )";
     }
 }
diff --git a/processor/src/test/java/org/mapstruct/ap/test/conversion/java8time/Java8TimeConversionTest.java b/processor/src/test/java/org/mapstruct/ap/test/conversion/java8time/Java8TimeConversionTest.java
index ab80eed6d..3dafe4395 100644
--- a/processor/src/test/java/org/mapstruct/ap/test/conversion/java8time/Java8TimeConversionTest.java
+++ b/processor/src/test/java/org/mapstruct/ap/test/conversion/java8time/Java8TimeConversionTest.java
@@ -240,12 +240,12 @@ public class Java8TimeConversionTest {
         source = SourceTargetMapper.INSTANCE.targetToSource( target );
 
         assertThat( source.getForDateConversionWithZonedDateTime() ).isEqualTo( dateTime );
-
     }
 
     @Test
     public void testLocalDateTimeToDateMapping() {
-        TimeZone.setDefault( TimeZone.getTimeZone( "UTC" ) );
+        TimeZone.setDefault( TimeZone.getTimeZone( "Australia/Melbourne" ) );
+
         Source source = new Source();
         LocalDateTime dateTime = LocalDateTime.of( 2014, 1, 1, 0, 0 );
         source.setForDateConversionWithLocalDateTime( dateTime );
@@ -266,7 +266,5 @@ public class Java8TimeConversionTest {
         source = SourceTargetMapper.INSTANCE.targetToSource( target );
 
         assertThat( source.getForDateConversionWithLocalDateTime() ).isEqualTo( dateTime );
-
     }
-
 }