Remove Java 1.8 method call

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/exec/trunk@1723464 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/test/java/org/apache/commons/exec/issues/Exec65Test.java b/src/test/java/org/apache/commons/exec/issues/Exec65Test.java
index 9b749ef..70275f7 100644
--- a/src/test/java/org/apache/commons/exec/issues/Exec65Test.java
+++ b/src/test/java/org/apache/commons/exec/issues/Exec65Test.java
@@ -72,9 +72,7 @@
 
         process.destroy();
 
-        while(process.isAlive()) {
-            Thread.sleep(50);
-        }
+        process.waitFor();
 
         assertTrue(process.exitValue() != 0);
     }