diff --git a/composer.json b/composer.json
index 10257964..d8e67832 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
 		"php": ">=5.4"
 	},
 	"require-dev": {
-		"nette/tester": "~1.4",
+		"nette/tester": "~1.4 != 1.6.1",
 		"mockery/mockery": "~0.9",
 		"tracy/tracy": "~2.3",
 		"nette/di": "~2.3"