diff --git a/core/src/main/java/module-info.java b/core/src/main/java/module-info.java
index 3ae73e7..ccaee99 100644
--- a/core/src/main/java/module-info.java
+++ b/core/src/main/java/module-info.java
@@ -5,7 +5,7 @@
  * @author Kai S. K. Engelbart
  * @since 0.0.1
  */
-module dev.kske.undoredo {
+module dev.kske.undoredo.core {
 
 	exports dev.kske.undoredo.core;
 }
diff --git a/pom.xml b/pom.xml
index f04ca06..70f0e57 100644
--- a/pom.xml
+++ b/pom.xml
@@ -171,7 +171,7 @@
 				<artifactId>maven-surefire-plugin</artifactId>
 				<version>3.0.0-M5</version>
 				<configuration>
-					<argLine>--add-opens dev.kske.undoredo/dev.kske.undoredo=ALL-UNNAMED</argLine>
+					<argLine>--add-opens dev.kske.undoredo.core/dev.kske.undoredo.core=ALL-UNNAMED</argLine>
 				</configuration>
 			</plugin>