diff --git a/pkgs/development/python-modules/pybind11/default.nix b/pkgs/development/python-modules/pybind11/default.nix
index 0f386a7c42f..442e6e70018 100644
--- a/pkgs/development/python-modules/pybind11/default.nix
+++ b/pkgs/development/python-modules/pybind11/default.nix
@@ -28,7 +28,7 @@ buildPythonPackage rec {
 
   cmakeFlags = [
     "-DEIGEN3_INCLUDE_DIR=${eigen}/include/eigen3"
-  ] ++ lib.optionals (!python.isPy2) [
+  ] ++ lib.optionals (python.isPy3k) [
   # Enable some tests only on Python 3. The "test_string_view" test
   # 'testTypeError: string_view16_chars(): incompatible function arguments'
   # fails on Python 2.
@@ -50,8 +50,8 @@ buildPythonPackage rec {
     popd
   '';
 
-  installCheckTarget = "pytest";
-  doInstallCheck = true;
+  doCheck = true;
+
   checkInputs = [
     pytest
     numpy