diff --git a/base/sourceTest/java/ch/systemsx/cisd/base/unix/UnixTests.java b/base/sourceTest/java/ch/systemsx/cisd/base/unix/UnixTests.java
index db064daf1ffd2fd7acdcb8126f4ee7e1bfcd9f08..48436b43be13b0bff16417b03ca184ffa32f3361 100644
--- a/base/sourceTest/java/ch/systemsx/cisd/base/unix/UnixTests.java
+++ b/base/sourceTest/java/ch/systemsx/cisd/base/unix/UnixTests.java
@@ -279,6 +279,11 @@ public class UnixTests extends AbstractFileSystemTestCase
     {
         System.out.println(BuildAndEnvironmentInfo.INSTANCE);
         System.out.println();
+        if (Unix.isOperational() == false)
+        {
+            System.err.println("No unix library found.");
+            System.exit(1);
+        }
         final UnixTests test = new UnixTests();
         try
         {