diff --git a/pkgs/development/python-modules/pytest-sanic/default.nix b/pkgs/development/python-modules/pytest-sanic/default.nix
index 84330cfd62e..ae1c56f95b7 100644
--- a/pkgs/development/python-modules/pytest-sanic/default.nix
+++ b/pkgs/development/python-modules/pytest-sanic/default.nix
@@ -46,5 +46,9 @@ buildPythonPackage rec {
     homepage = "https://github.com/yunstanford/pytest-sanic/";
     license = licenses.asl20;
     maintainers = [ maintainers.costrouc ];
+    # pytest-sanic is incompatible with Sanic 21.3, see
+    # https://github.com/sanic-org/sanic/issues/2095 and
+    # https://github.com/yunstanford/pytest-sanic/issues/50.
+    broken = lib.versionAtLeast sanic.version "21.3.0";
   };
 }
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 10c07d8d4b4..9c418635522 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -7195,6 +7195,14 @@ in {
 
   samsungtvws = callPackage ../development/python-modules/samsungtvws { };
 
+  sanic = callPackage ../development/python-modules/sanic {
+    # pytest-sanic is doing ok for the sole purpose of testing Sanic.
+    pytest-sanic = self.pytest-sanic.overridePythonAttrs (oldAttrs: {
+      doCheck = false;
+      meta.broken = false;
+    });
+  };
+
   sanic-auth = callPackage ../development/python-modules/sanic-auth { };
 
   sanic = callPackage ../development/python-modules/sanic { };