diff --git a/.travis.yml b/.travis.yml
index 605e838e53..256fb0da0f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -26,4 +26,5 @@ script:
   - nimble install zip
   - nimble install opengl
   - nimble install sdl1
-  - ./koch test --pedantic all
+  - nim c --taintMode:on tests/testament/tester
+  - tests/testament/tester --pedantic all
diff --git a/appveyor.yml b/appveyor.yml
index 98a35d73f5..11f6c5854b 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -32,4 +32,5 @@ before_test:
   - nimble install zip
 
 test_script:
-  - koch test --pedantic all
+  - nim c --taintMode:on tests/testament/tester
+  - tests/testament/tester --pedantic all