diff --git a/lib/matplotlib/tests/test_backends_interactive.py b/lib/matplotlib/tests/test_backends_interactive.py
index 101c1cb81cad..188983816372 100644
--- a/lib/matplotlib/tests/test_backends_interactive.py
+++ b/lib/matplotlib/tests/test_backends_interactive.py
@@ -669,7 +669,7 @@ def _impl_test_interactive_timers():
     assert mock.call_count > 1
 
     # Now turn it into a single shot timer and verify only one gets triggered
-    mock.call_count = 0
+    mock.reset_mock()
     timer.single_shot = True
     timer.start()
     plt.pause(pause_time)
diff --git a/lib/matplotlib/tests/test_colors.py b/lib/matplotlib/tests/test_colors.py
index 1c4cebf037e4..0aef16428f9f 100644
--- a/lib/matplotlib/tests/test_colors.py
+++ b/lib/matplotlib/tests/test_colors.py
@@ -1646,7 +1646,7 @@ def test_norm_callback():
     assert increment.call_count == 2
 
     # We only want autoscale() calls to send out one update signal
-    increment.call_count = 0
+    increment.reset_mock()
     norm.autoscale([0, 1, 2])
     assert increment.call_count == 1