diff --git a/pkgs/tools/misc/bonfire/default.nix b/pkgs/tools/misc/bonfire/default.nix
index b8e5e3de6506..2bde876c68c1 100644
--- a/pkgs/tools/misc/bonfire/default.nix
+++ b/pkgs/tools/misc/bonfire/default.nix
@@ -30,7 +30,7 @@ buildPythonApplication rec {
       --replace "data_files = *.rst, *.txt" ""
   '';
 
-  buildInputs = [ httpretty pytest pytestcov ];
+  buildInputs = [ httpretty pytest_3 pytestcov ];
 
   propagatedBuildInputs = [ arrow click keyring parsedatetime requests six termcolor ];