diff --git a/processor/src/test/java/org/mapstruct/ap/test/bugs/_2544/Issue2544Test.java b/processor/src/test/java/org/mapstruct/ap/test/bugs/_2544/Issue2544Test.java
index 5cc252bbf..a07023183 100644
--- a/processor/src/test/java/org/mapstruct/ap/test/bugs/_2544/Issue2544Test.java
+++ b/processor/src/test/java/org/mapstruct/ap/test/bugs/_2544/Issue2544Test.java
@@ -9,6 +9,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 
 import java.math.BigDecimal;
 
+import org.junitpioneer.jupiter.DefaultLocale;
 import org.mapstruct.ap.testutil.IssueKey;
 import org.mapstruct.ap.testutil.ProcessorTest;
 import org.mapstruct.ap.testutil.WithClasses;
@@ -19,12 +20,23 @@ import org.mapstruct.ap.testutil.WithClasses;
 @IssueKey( "2544" )
 @WithClasses( { Issue2544Mapper.class } )
 public class Issue2544Test {
+    // Parsing numbers is sensitive to locale settings (e.g. decimal point)
 
     @ProcessorTest
-    public void shouldConvert() {
+    @DefaultLocale("en")
+    public void shouldConvertEn() {
         Issue2544Mapper.Target target = Issue2544Mapper.INSTANCE.map( "123.45679E6" );
 
         assertThat( target ).isNotNull();
         assertThat( target.getBigNumber() ).isEqualTo( new BigDecimal( "1.2345679E+8" ) );
     }
+
+    @ProcessorTest
+    @DefaultLocale("de")
+    public void shouldConvertDe() {
+        Issue2544Mapper.Target target = Issue2544Mapper.INSTANCE.map( "123,45679E6" );
+
+        assertThat( target ).isNotNull();
+        assertThat( target.getBigNumber() ).isEqualTo( new BigDecimal( "1.2345679E+8" ) );
+    }
 }