diff --git a/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/optim/nonlinear/scalar/noderiv/SimplexOptimizerNelderMeadTest.java b/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/optim/nonlinear/scalar/noderiv/SimplexOptimizerNelderMeadTest.java
index bd2ad2550..6745c5116 100644
--- a/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/optim/nonlinear/scalar/noderiv/SimplexOptimizerNelderMeadTest.java
+++ b/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/optim/nonlinear/scalar/noderiv/SimplexOptimizerNelderMeadTest.java
@@ -245,7 +245,7 @@ private void doTest(MultivariateFunction func,
         Assert.assertEquals(name + ": distance to optimum", 0d, dist, tol);
 
         final int nEval = optim.getEvaluations();
-        Assert.assertTrue(name + ": nEval=" + nEval,
+        Assert.assertTrue(name + ": nEval=" + nEval + " < " + maxEvaluations,
                           nEval < maxEvaluations);
     }
 }
diff --git a/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/optim/nonlinear/scalar/noderiv/SimplexOptimizerTest.java b/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/optim/nonlinear/scalar/noderiv/SimplexOptimizerTest.java
index 43b00de93..c7826cae7 100644
--- a/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/optim/nonlinear/scalar/noderiv/SimplexOptimizerTest.java
+++ b/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/optim/nonlinear/scalar/noderiv/SimplexOptimizerTest.java
@@ -232,7 +232,7 @@ public String toString() {
 
             final int nEval = optim.getEvaluations();
             Assertions.assertTrue(nEval < functionEvaluations,
-                                  () -> name + ": nEval=" + nEval);
+                                  () -> name + ": nEval=" + nEval + " < " + functionEvaluations);
         }
 
         /**