Reduce amount of CI output on success
diff --git a/appveyor.yml b/appveyor.yml
index f3a2c5b..08a609d 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -58,4 +58,5 @@
 
 test_script:
   - cd Build
-  - ctest -V -j 2 -C %CONFIGURATION%
+  - set CTEST_OUTPUT_ON_FAILURE=1
+  - ctest -j 2 -C %CONFIGURATION%