[Tests] Ignore 3rd-party deprecation warnings in pytest

Move pytest config from tox to pyproject and ignore deprecation warning
generated in 3rd-party libraries.

Fixed GObject deprecation warning

deluge/ui/gtk3/listview.py

@@ -72,7 +72,7 @@ class ListView:
         """
 
         __gsignals__ = {
-            'button-press-event': (GObject.SIGNAL_RUN_LAST, None, (object,))
+            'button-press-event': (GObject.SignalFlags.RUN_LAST, None, (object,))
         }
 
         def __init__(self, title=None, cell_renderer=None, **args):

pyproject.toml

@@ -9,3 +9,20 @@ skip-string-normalization = true
 
 [tool.isort]
 profile = "black"
+
+[tool.pytest.ini_options]
+# Hide logged warnings and errors in test output.
+log_cli_level = "CRITICAL"
+addopts = "--basetemp=_pytest_temp"
+markers = [
+    "todo: Tests that are yet to be written",
+    "gtkui: Tests for GTK code",
+    "security: Security related tests",
+    "slow: Tests that are particularly slow",
+    "internet: Tests that require internet connectivity",
+]
+filterwarnings = [
+    "ignore::DeprecationWarning:gi",
+    "ignore::DeprecationWarning:twisted.internet.gireactor:43",
+    "ignore:twisted.web.resource.*:DeprecationWarning",
+]

tox.ini

@@ -7,17 +7,6 @@
 envlist = py3, lint, docs
 minversion=3.0
 
-[pytest]
-# Hide logged warnings and errors in test output.
-log_cli_level = CRITICAL
-addopts = -p no:warnings --basetemp=_pytest_temp
-markers =
-    todo: Tests that are yet to be written
-    gtkui: Tests for GTK code
-    security: Security related tests
-    slow: Tests that are particularly slow
-    internet: Tests that require internet connectivity
-
 # =================
 # Base dependencies
 # =================