diff --git a/java-checks-testkit/src/main/java/org/sonar/java/checks/verifier/internal/Expectations.java b/java-checks-testkit/src/main/java/org/sonar/java/checks/verifier/internal/Expectations.java
index e514f7f8b2e..4ce62581b8c 100644
--- a/java-checks-testkit/src/main/java/org/sonar/java/checks/verifier/internal/Expectations.java
+++ b/java-checks-testkit/src/main/java/org/sonar/java/checks/verifier/internal/Expectations.java
@@ -309,7 +309,7 @@ Optional<String> containFlow(List<AnalyzerMessage> actual) {
     // more than 1 flow with same lines, let's check messages
     List<String> actualMessages = actual.stream().map(AnalyzerMessage::getMessage).toList();
     Optional<String> foundFlow = expectedFlows.stream().filter(flowId -> hasSameMessages(flowId, actualMessages)).findFirst();
-    foundFlow.ifPresent(flowId -> seenFlowIds.add(flowId));
+    foundFlow.ifPresent(seenFlowIds::add);
     return foundFlow;
   }