diff --git a/pkgs/development/python-modules/sanic/default.nix b/pkgs/development/python-modules/sanic/default.nix
index cc7be4c93dc6..ada49c7d92c3 100644
--- a/pkgs/development/python-modules/sanic/default.nix
+++ b/pkgs/development/python-modules/sanic/default.nix
@@ -10,7 +10,6 @@
 , multidict
 , pytest-asyncio
 , pytest-benchmark
-, pytest-sanic
 , pytest-sugar
 , pytestCheckHook
 , sanic-routing
@@ -23,28 +22,19 @@
 
 buildPythonPackage rec {
   pname = "sanic";
-  version = "21.3.4";
+  version = "21.9.1";
 
   src = fetchFromGitHub {
     owner = "sanic-org";
     repo = pname;
     rev = "v${version}";
-    sha256 = "0vldlic8gqcf56fqb31igycqf11syd9csk66v34w6dim54lcny2b";
+    sha256 = "sha256-TRrJr/L8AXLAARPjhBi2FxNh+jvxxdeMN24cT1njmqY=";
   };
 
-  patches = [
-    # Allow later websockets release, https://github.com/sanic-org/sanic/pull/2154
-    (fetchpatch {
-      name = "later-websockets.patch";
-      url = "https://github.com/sanic-org/sanic/commit/5fb820b5c1ce395e86a1ee11996790c65ec7bc65.patch";
-      sha256 = "1glvq23pf1sxqjnrz0w8rr7nsnyz82k1479b3rm8szfkjg9q5d1w";
-    })
-  ];
-
   postPatch = ''
     # Loosen dependency requirements.
     substituteInPlace setup.py \
-      --replace '"pytest==5.2.1"' '"pytest"' \
+      --replace '"pytest==6.2.5"' '"pytest"' \
       --replace '"gunicorn==20.0.4"' '"gunicorn"' \
       --replace '"pytest-sanic",' "" \
     # Patch a request headers test to allow brotli encoding
@@ -68,7 +58,6 @@ buildPythonPackage rec {
     gunicorn
     pytest-asyncio
     pytest-benchmark
-    pytest-sanic
     pytest-sugar
     pytestCheckHook
     sanic-testing
@@ -77,6 +66,11 @@ buildPythonPackage rec {
 
   inherit doCheck;
 
+  preCheck = ''
+    # Some tests depends on executables on PATH
+    PATH="$out/bin:${gunicorn}/bin:$PATH"
+  '';
+
   disabledTests = [
     # Tests are flaky
     "test_keep_alive_client_timeout"
@@ -84,6 +78,11 @@ buildPythonPackage rec {
     "test_check_timeouts_response_timeout"
     "test_reloader_live"
     "test_zero_downtime"
+    # Not working from 21.9.1
+    "test_create_server_main"
+    "test_create_server_main_convenience"
+    "test_debug"
+    "test_auto_reload"
   ];
 
   __darwinAllowLocalNetworking = true;