diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 2afd3581fca6cb52703a3e2917caf043612bf487..52434263453100cc55e9120709f6703563e9ba5e 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -95,7 +95,6 @@ SET (CTEST_DROP_SITE_CDASH FALSE)
       TIMEOUT 180
       RUN_SERIAL TRUE
       PROCESSORS 1
-      ENVIRONMENT "PYTHONUNBUFFERED=1"
   ) 
 
   # ========================================================================