diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index dd44b1d4a4b..38de9fb1758 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1892,7 +1892,7 @@ self : let callPackage = x : y : modifyPrio (newScope self x y); in
 
   punycode = callPackage ../development/libraries/haskell/punycode {};
 
-  pureCdb = callPackage ../development/libraries/haskell/pure-cdb {};
+  pureCdb = callPackage ../development/libraries/haskell/pure-cdb { testSimple = null; };
 
   primitive_0_5_0_1 = callPackage ../development/libraries/haskell/primitive/0.5.0.1.nix {};
   primitive_0_5_2_1 = callPackage ../development/libraries/haskell/primitive/0.5.2.1.nix {};
@@ -2881,7 +2881,7 @@ self : let callPackage = x : y : modifyPrio (newScope self x y); in
     };
   };
 
-  hscope = callPackage ../development/tools/haskell/hscope {};
+  hscope = callPackage ../development/tools/haskell/hscope { testSimple = null; };
 
   hslogger = callPackage ../development/tools/haskell/hslogger {};