diff --git a/commons-rng-examples/examples-stress/src/main/java/org/apache/commons/rng/examples/stress/ResultsCommand.java b/commons-rng-examples/examples-stress/src/main/java/org/apache/commons/rng/examples/stress/ResultsCommand.java
index 85ec4c5..e0ee5d0 100644
--- a/commons-rng-examples/examples-stress/src/main/java/org/apache/commons/rng/examples/stress/ResultsCommand.java
+++ b/commons-rng-examples/examples-stress/src/main/java/org/apache/commons/rng/examples/stress/ResultsCommand.java
@@ -1025,7 +1025,7 @@
                                                  .collect(Collectors.joining(", "));
                         // Summarise the failures across all tests
                         final String summary = getFailuresSummary(testResults);
-                        if (summary.length() != 0) {
+                        if (!summary.isEmpty()) {
                             // Identify RNGs with no systematic failures
                             highlight = false;
                             if (showFailedTests) {