diff --git a/pkgs/development/python-modules/pytest/default.nix b/pkgs/development/python-modules/pytest/default.nix
index cdfdb8a64c95..93d257f4bfff 100644
--- a/pkgs/development/python-modules/pytest/default.nix
+++ b/pkgs/development/python-modules/pytest/default.nix
@@ -3,7 +3,7 @@
 , atomicwrites, mock, writeText, pathlib2
 }:
 buildPythonPackage rec {
-  version = "3.7.4";
+  version = "3.9.2";
   pname = "pytest";
 
   preCheck = ''
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "2d7c49e931316cc7d1638a3e5f54f5d7b4e5225972b3c9838f3584788d27f349";
+    sha256 = "212be78a6fa5352c392738a49b18f74ae9aeec1040f47c81cadbfd8d1233c310";
   };
 
   checkInputs = [ hypothesis mock ];
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 9b420d3f7295..f6dd54a4afec 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -1289,9 +1289,9 @@ in {
 
   pyhepmc = callPackage ../development/python-modules/pyhepmc { };
 
-  pytest = self.pytest_37;
+  pytest = self.pytest_39;
 
-  pytest_37 = callPackage ../development/python-modules/pytest {
+  pytest_39 = callPackage ../development/python-modules/pytest {
     # hypothesis tests require pytest that causes dependency cycle
     hypothesis = self.hypothesis.override { doCheck = false; };
   };