diff --git a/pkgs/applications/networking/instant-messengers/mirage/default.nix b/pkgs/applications/networking/instant-messengers/mirage/default.nix
index 3b6b9bfc6f9..42ea1c52fa9 100644
--- a/pkgs/applications/networking/instant-messengers/mirage/default.nix
+++ b/pkgs/applications/networking/instant-messengers/mirage/default.nix
@@ -1,6 +1,6 @@
 { lib, stdenv, mkDerivation, fetchFromGitHub
 , qmake, pkg-config, olm, wrapQtAppsHook
-, qtbase, qtquickcontrols2, qtkeychain, qtmultimedia, qttools, qtgraphicaleffects
+, qtbase, qtquickcontrols2, qtkeychain, qtmultimedia, qtgraphicaleffects
 , python3Packages, pyotherside, libXScrnSaver
 }:
 
diff --git a/pkgs/development/python-modules/cairosvg/default.nix b/pkgs/development/python-modules/cairosvg/default.nix
index 0244f772be1..58b8c267306 100644
--- a/pkgs/development/python-modules/cairosvg/default.nix
+++ b/pkgs/development/python-modules/cairosvg/default.nix
@@ -1,25 +1,44 @@
-{ lib, buildPythonPackage, fetchPypi, isPy3k, fetchpatch
-, cairocffi, cssselect2, defusedxml, pillow, tinycss2
-, pytest, pytestrunner, pytestcov, pytest-flake8, pytest-isort }:
+{ lib
+, buildPythonPackage
+, fetchPypi
+, isPy3k
+, cairocffi
+, cssselect2
+, defusedxml
+, pillow
+, tinycss2
+, pytestCheckHook
+, pytest-runner
+, pytest-flake8
+, pytest-isort
+}:
 
 buildPythonPackage rec {
   pname = "CairoSVG";
-  version = "2.5.1";
-
+  version = "2.5.2";
   disabled = !isPy3k;
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "bfa0deea7fa0b9b2f29e41b747a915c249dbca731a4667c2917e47ff96e773e0";
+    sha256 = "sha256-sLmSnPXboAUXjXRqgDb88AJVUPSYylTbYYczIjhHg7w=";
   };
 
+  buildInputs = [ pytest-runner ];
+
   propagatedBuildInputs = [ cairocffi cssselect2 defusedxml pillow tinycss2 ];
 
-  checkInputs = [ pytest pytestrunner pytestcov pytest-flake8 pytest-isort ];
+  checkInputs = [ pytestCheckHook pytest-flake8 pytest-isort ];
+
+  pytestFlagsArray = [
+    "cairosvg/test_api.py"
+  ];
+
+  pythonImportsCheck = [ "cairosvg" ];
 
   meta = with lib; {
     homepage = "https://cairosvg.org";
-    license = licenses.lgpl3;
+    license = licenses.lgpl3Plus;
     description = "SVG converter based on Cairo";
+    maintainers = with maintainers; [ SuperSandro2000 ];
   };
 }
diff --git a/pkgs/development/python-modules/celery/default.nix b/pkgs/development/python-modules/celery/default.nix
index e1fb0b98ea0..f0fe81f85e2 100644
--- a/pkgs/development/python-modules/celery/default.nix
+++ b/pkgs/development/python-modules/celery/default.nix
@@ -1,5 +1,5 @@
 { lib, buildPythonPackage, fetchPypi
-, billiard, click, click-didyoumean, click-repl, kombu, pytz, vine
+, billiard, click, click-didyoumean, click-plugins, click-repl, kombu, pytz, vine
 , boto3, case, moto, pytest, pytest-celery, pytest-subtests, pytest-timeout
 }:
 
@@ -17,7 +17,7 @@ buildPythonPackage rec {
       --replace "moto==1.3.7" moto
   '';
 
-  propagatedBuildInputs = [ billiard click click-didyoumean click-repl kombu pytz vine ];
+  propagatedBuildInputs = [ billiard click click-didyoumean click-plugins click-repl kombu pytz vine ];
 
   checkInputs = [ boto3 case moto pytest pytest-celery pytest-subtests pytest-timeout ];
 
@@ -38,5 +38,6 @@ buildPythonPackage rec {
     homepage = "https://github.com/celery/celery/";
     description = "Distributed task queue";
     license = licenses.bsd3;
+    maintainers = [ ];
   };
 }
diff --git a/pkgs/development/python-modules/flower/default.nix b/pkgs/development/python-modules/flower/default.nix
index 09368552966..3662116bc2a 100644
--- a/pkgs/development/python-modules/flower/default.nix
+++ b/pkgs/development/python-modules/flower/default.nix
@@ -35,11 +35,13 @@ buildPythonPackage rec {
 
   checkInputs = [ mock ];
 
+  pythonImportsCheck = [ "flower" ];
+
   meta = with lib; {
     description = "Celery Flower";
     homepage = "https://github.com/mher/flower";
     license = licenses.bsdOriginal;
     maintainers = [ maintainers.arnoldfarkas ];
-    broken = (celery.version == "5.0.2"); # currently broken with celery>=5.0 by https://github.com/mher/flower/pull/1021
+    broken = (celery.version >= "5.0.2"); # currently broken with celery>=5.0 by https://github.com/mher/flower/pull/1021
   };
 }