diff --git a/src/test/java/org/apache/commons/math/analysis/solvers/UnivariateRealSolverUtilsTest.java b/src/test/java/org/apache/commons/math/analysis/solvers/UnivariateRealSolverUtilsTest.java
index c02c3bef3..709e38d82 100644
--- a/src/test/java/org/apache/commons/math/analysis/solvers/UnivariateRealSolverUtilsTest.java
+++ b/src/test/java/org/apache/commons/math/analysis/solvers/UnivariateRealSolverUtilsTest.java
@@ -42,7 +42,7 @@ public class UnivariateRealSolverUtilsTest extends TestCase {
 
     public void testSolveBadEndpoints() throws MathException {
         try { // bad endpoints
-            UnivariateRealSolverUtils.solve(sin,0.0, 4.0, 4.0);
+            UnivariateRealSolverUtils.solve(sin, -0.1, 4.0, 4.0);
             fail("Expecting IllegalArgumentException");
         } catch (IllegalArgumentException ex) {
             // expected