diff --git a/core/sail/shacl/src/test/java/org/eclipse/rdf4j/sail/shacl/UnknownShapesTest.java b/core/sail/shacl/src/test/java/org/eclipse/rdf4j/sail/shacl/UnknownShapesTest.java
index 7103c054e9..6499bbf185 100644
--- a/core/sail/shacl/src/test/java/org/eclipse/rdf4j/sail/shacl/UnknownShapesTest.java
+++ b/core/sail/shacl/src/test/java/org/eclipse/rdf4j/sail/shacl/UnknownShapesTest.java
@@ -87,6 +87,7 @@ private Set<String> getRelevantLog(int expectedNumberOfItems) {
 					.map(String::trim)
 					.collect(Collectors.toSet());
 		} while (relevantLog.size() < expectedNumberOfItems);
+		assert relevantLog.size() == expectedNumberOfItems;
 		return relevantLog;
 	}
 
@@ -105,7 +106,7 @@ public void testComplexPath() throws IOException {
 			}
 		}
 
-		Set<String> relevantLog = getRelevantLog(4).stream()
+		Set<String> relevantLog = getRelevantLog(5).stream()
 				.sorted()
 				.collect(Collectors.toCollection(LinkedHashSet::new));