diff --git a/tests/plots/test_declarative.py b/tests/plots/test_declarative.py
index 25a4cc47798..259c9b632e5 100644
--- a/tests/plots/test_declarative.py
+++ b/tests/plots/test_declarative.py
@@ -432,7 +432,7 @@ def test_declarative_additional_layers_plot_options():
 
 @pytest.mark.mpl_image_compare(
     remove_text=True,
-    tolerance=2.74 if version_check('matplotlib<3.8') else 0.74)
+    tolerance=2.74 if version_check('matplotlib<3.8') else 1.91)
 @needs_cartopy
 def test_declarative_contour_convert_units():
     """Test making a contour plot."""