Try JUnit 6

compatibility/pom.xml

@@ -14,7 +14,7 @@
     <properties>
         <hamcrest.version>3.0</hamcrest.version>
         <jackson.version>2.20.0</jackson.version>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
         <project.Automatic-Module-Name>io.cucumber.compatibility</project.Automatic-Module-Name>
     </properties>
 

cucumber-archetype/pom.xml

@@ -15,7 +15,7 @@
     <description>Cucumber JVM: Maven Archetype</description>
 
     <properties>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
         <assertj.version>3.27.4</assertj.version>
         <maven-compiler-plugin.version>3.14.0</maven-compiler-plugin.version>
         <maven-surefire-plugin.version>3.5.4</maven-surefire-plugin.version>

cucumber-cdi2/pom.xml

@@ -7,7 +7,7 @@
         <openwebbeans.version>2.0.28</openwebbeans.version>
         <weld-se-core.version>3.1.9.Final</weld-se-core.version>
         <apiguardian-api.version>1.1.2</apiguardian-api.version>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
         <hamcrest.version>2.2</hamcrest.version>
     </properties>
 

cucumber-core/pom.xml

@@ -16,7 +16,7 @@
         <apiguardian-api.version>1.1.2</apiguardian-api.version>
         <jackson.version>2.20.0</jackson.version>
         <jsoup.version>1.21.2</jsoup.version>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
         <xmlunit.version>2.10.3</xmlunit.version>
         <hamcrest.version>3.0</hamcrest.version>
         <hamcrest-json.version>0.2</hamcrest-json.version>

cucumber-deltaspike/pom.xml

@@ -16,7 +16,7 @@
         <apiguardian-api.version>1.1.2</apiguardian-api.version>
         <cdi-api.version>2.0.SP1</cdi-api.version>
         <deltaspike.version>1.9.6</deltaspike.version>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
         <project.Automatic-Module-Name>io.cucumber.deltaspike</project.Automatic-Module-Name>
     </properties>
 

cucumber-gherkin-messages/pom.xml

@@ -8,7 +8,7 @@
     </parent>
 
     <properties>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
         <project.Automatic-Module-Name>io.cucumber.core.gherkin.messages</project.Automatic-Module-Name>
     </properties>
 

cucumber-gherkin/pom.xml

@@ -8,7 +8,7 @@
     </parent>
 
     <properties>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
         <project.Automatic-Module-Name>io.cucumber.core.gherkin</project.Automatic-Module-Name>
     </properties>
 

cucumber-guice/pom.xml

@@ -15,7 +15,7 @@
         <apiguardian-api.version>1.1.2</apiguardian-api.version>
         <guice.version>7.0.0</guice.version>
         <hamcrest.version>3.0</hamcrest.version>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
         <project.Automatic-Module-Name>io.cucumber.guice</project.Automatic-Module-Name>
         <mockito.version>5.19.0</mockito.version>
     </properties>

cucumber-jakarta-cdi/pom.xml

@@ -6,7 +6,7 @@
         <apiguardian-api.version>1.1.2</apiguardian-api.version>
         <jakarta.enterprise.cdi-api.version>4.1.0</jakarta.enterprise.cdi-api.version>
         <jakarta.activation-api.version>2.1.4</jakarta.activation-api.version>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
         <hamcrest.version>3.0</hamcrest.version>
         <weld.version>5.1.6.Final</weld.version>
     </properties>

cucumber-jakarta-openejb/pom.xml

@@ -14,7 +14,7 @@
     <properties>
         <apiguardian-api.version>1.1.2</apiguardian-api.version>
         <hamcrest.version>3.0</hamcrest.version>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
         <openejb-core.version>9.1.3</openejb-core.version>
         <project.Automatic-Module-Name>io.cucumber.jakarta.openejb</project.Automatic-Module-Name>
     </properties>

cucumber-java/pom.xml

@@ -16,7 +16,7 @@
         <apiguardian-api.version>1.1.2</apiguardian-api.version>
         <hamcrest.version>3.0</hamcrest.version>
         <jackson.version>2.20.0</jackson.version>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
         <mockito.version>5.19.0</mockito.version>
     </properties>
 

cucumber-java8/pom.xml

@@ -15,7 +15,7 @@
         <project.Automatic-Module-Name>io.cucumber.java8</project.Automatic-Module-Name>
         <apiguardian-api.version>1.1.2</apiguardian-api.version>
         <hamcrest.version>3.0</hamcrest.version>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
         <mockito.version>5.19.0</mockito.version>
         <typetools.version>0.6.3</typetools.version>
     </properties>

cucumber-junit-platform-engine/pom.xml

@@ -13,7 +13,7 @@
 
     <properties>
         <hamcrest.version>3.0</hamcrest.version>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
     </properties>
 
     <dependencyManagement>

cucumber-junit-platform-engine/src/test/java/io/cucumber/junit/platform/engine/EmptyConfigurationParameters.java

@@ -18,11 +18,6 @@ public Optional<Boolean> getBoolean(String key) {
         return Optional.empty();
     }
 
-    @Override
-    public int size() {
-        return 0;
-    }
-
     @Override
     public Set<String> keySet() {
         return Collections.emptySet();

cucumber-junit-platform-engine/src/test/java/io/cucumber/junit/platform/engine/MapConfigurationParameters.java

@@ -29,11 +29,6 @@ public Optional<Boolean> getBoolean(String key) {
         return get(key, Boolean::valueOf);
     }
 
-    @Override
-    public int size() {
-        return 0;
-    }
-
     @Override
     public Set<String> keySet() {
         return parameters.keySet();

cucumber-junit/pom.xml

@@ -14,7 +14,7 @@
     <properties>
         <apiguardian-api.version>1.1.2</apiguardian-api.version>
         <hamcrest.version>3.0</hamcrest.version>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
         <junit.version>4.13.2</junit.version>
         <mockito.version>5.19.0</mockito.version>
         <project.Automatic-Module-Name>io.cucumber.junit</project.Automatic-Module-Name>

cucumber-kotlin-java8/pom.xml

@@ -14,7 +14,7 @@
     <properties>
         <project.Automatic-Module-Name>io.cucumber.kotlin.java8</project.Automatic-Module-Name>
         <kotlin.version>2.2.20</kotlin.version>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
     </properties>
 
     <dependencyManagement>

cucumber-openejb/pom.xml

@@ -14,7 +14,7 @@
     <properties>
         <apiguardian-api.version>1.1.2</apiguardian-api.version>
         <hamcrest.version>3.0</hamcrest.version>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
         <openejb-core.version>8.0.16</openejb-core.version>
         <project.Automatic-Module-Name>io.cucumber.openejb</project.Automatic-Module-Name>
     </properties>

cucumber-picocontainer/pom.xml

@@ -15,7 +15,7 @@
         <project.Automatic-Module-Name>io.cucumber.picocontainer</project.Automatic-Module-Name>
         <picocontainer.version>2.15.2</picocontainer.version>
         <apiguardian-api.version>1.1.2</apiguardian-api.version>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
     </properties>
 
     <dependencyManagement>

cucumber-plugin/pom.xml

@@ -12,7 +12,7 @@
     <description>Plugin interface for Cucumber-JVM</description>
 
     <properties>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
         <apiguardian-api.version>1.1.2</apiguardian-api.version>
         <project.Automatic-Module-Name>io.cucumber.plugin</project.Automatic-Module-Name>
     </properties>

cucumber-spring/pom.xml

@@ -14,7 +14,7 @@
     <properties>
         <apiguardian-api.version>1.1.2</apiguardian-api.version>
         <hamcrest.version>3.0</hamcrest.version>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
         <spring.version>6.2.11</spring.version>
         <project.Automatic-Module-Name>io.cucumber.spring</project.Automatic-Module-Name>
         <mockito.version>5.19.0</mockito.version>

datatable-matchers/pom.xml

@@ -17,7 +17,7 @@
         <apiguardian-api.version>1.1.2</apiguardian-api.version>
         <guava.version>33.4.8-jre</guava.version>
         <hamcrest.version>3.0</hamcrest.version>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
     </properties>
 
     <dependencyManagement>

datatable/pom.xml

@@ -19,7 +19,7 @@
         <guava.version>33.4.8-jre</guava.version>
         <hamcrest.version>3.0</hamcrest.version>
         <jackson.version>2.20.0</jackson.version>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
         <mockito.version>5.19.0</mockito.version>
     </properties>
 

docstring/pom.xml

@@ -13,7 +13,7 @@
 
     <properties>
         <jackson.version>2.20.0</jackson.version>
-        <junit-jupiter.version>5.13.4</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
         <apiguardian-api.version>1.1.2</apiguardian-api.version>
         <project.Automatic-Module-Name>io.cucumber.docstring</project.Automatic-Module-Name>
         <hamcrest.version>3.0</hamcrest.version>

examples/wicket-java-junit4/wicket-main/pom.xml

@@ -14,7 +14,7 @@
         <wicket.version>9.4.0</wicket.version>
         <jetty.version>9.4.43.v20210629</jetty.version>
         <jcl-over-slf4.version>2.0.5</jcl-over-slf4.version>
-        <junit-jupiter.version>5.13.1</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
         <logback-classic.version>1.4.7</logback-classic.version>
     </properties>
 

examples/wicket-java-junit4/wicket-test/pom.xml

@@ -10,7 +10,7 @@
 
     <properties>
         <project.Automatic-Module-Name>io.cucumber.examples.wicket.test</project.Automatic-Module-Name>
-        <junit-jupiter.version>5.13.1</junit-jupiter.version>
+        <junit-jupiter.version>6.0.0-M2</junit-jupiter.version>
         <htmlunit.version>4.13.0</htmlunit.version>
     </properties>