python3Packages.pytest_6: make alias

pkgs/top-level/python-aliases.nix

@@ -84,6 +84,7 @@ mapAliases ({
   pylibgen = throw "pylibgen is unmaintained upstreamed, and removed from nixpkgs"; # added 2020-06-20
   pymssql = throw "pymssql has been abandoned upstream."; # added 2020-05-04
   pysmart-smartx = pysmart; # added 2021-10-22
+  pytest_6 = pytest; # added 2022-02-10
   pytestcov = pytest-cov; # added 2021-01-04
   pytest-pep8 = pytestpep8; # added 2021-01-04
   pytestpep8 = throw "pytestpep8 was removed because it is abandoned and no longer compatible with pytest v6.0"; # added 2020-12-10

pkgs/top-level/python-packages.nix

@@ -7643,15 +7643,12 @@ in {
 
   pytesseract = callPackage ../development/python-modules/pytesseract { };
 
-  pytest = self.pytest_6;
-
-  pytest_6 =
-    callPackage ../development/python-modules/pytest {
-      # hypothesis tests require pytest that causes dependency cycle
-      hypothesis = self.hypothesis.override {
-        doCheck = false;
-      };
+  pytest = callPackage ../development/python-modules/pytest {
+    # hypothesis tests require pytest that causes dependency cycle
+    hypothesis = self.hypothesis.override {
+      doCheck = false;
     };
+  };
 
   pytest_6_1 = self.pytest_6.overridePythonAttrs (oldAttrs: rec {
     version = "6.1.2";