diff --git a/pkgs/development/python-modules/colanderalchemy/default.nix b/pkgs/development/python-modules/colanderalchemy/default.nix
index 78f0f6fe371..686608445ab 100644
--- a/pkgs/development/python-modules/colanderalchemy/default.nix
+++ b/pkgs/development/python-modules/colanderalchemy/default.nix
@@ -30,6 +30,9 @@ buildPythonPackage rec {
     description = "Autogenerate Colander schemas based on SQLAlchemy models";
     homepage = https://github.com/stefanofontanelli/ColanderAlchemy;
     license = licenses.mit;
+    # ColanderAlchemy's tests currently fail with colander >1.6.0
+    # (see https://github.com/stefanofontanelli/ColanderAlchemy/issues/107)
+    broken = versionOlder "1.6.0" colander.version;
   };
 
 }