diff --git a/lib/cartopy/tests/mpl/baseline_images/mpl/test_ticks/xticks_cylindrical.png b/lib/cartopy/tests/mpl/baseline_images/mpl/test_ticks/xticks_cylindrical.png
index e213b16cd..e7dac31bf 100644
Binary files a/lib/cartopy/tests/mpl/baseline_images/mpl/test_ticks/xticks_cylindrical.png and b/lib/cartopy/tests/mpl/baseline_images/mpl/test_ticks/xticks_cylindrical.png differ
diff --git a/lib/cartopy/tests/mpl/baseline_images/mpl/test_ticks/xticks_no_transform.png b/lib/cartopy/tests/mpl/baseline_images/mpl/test_ticks/xticks_no_transform.png
index 8ed5bf8cb..50b447625 100644
Binary files a/lib/cartopy/tests/mpl/baseline_images/mpl/test_ticks/xticks_no_transform.png and b/lib/cartopy/tests/mpl/baseline_images/mpl/test_ticks/xticks_no_transform.png differ
diff --git a/lib/cartopy/tests/mpl/baseline_images/mpl/test_ticks/xyticks.png b/lib/cartopy/tests/mpl/baseline_images/mpl/test_ticks/xyticks.png
index 3c0af1f61..e2520af1c 100644
Binary files a/lib/cartopy/tests/mpl/baseline_images/mpl/test_ticks/xyticks.png and b/lib/cartopy/tests/mpl/baseline_images/mpl/test_ticks/xyticks.png differ
diff --git a/lib/cartopy/tests/mpl/baseline_images/mpl/test_ticks/yticks_cylindrical.png b/lib/cartopy/tests/mpl/baseline_images/mpl/test_ticks/yticks_cylindrical.png
index 248a4071e..15e8399ca 100644
Binary files a/lib/cartopy/tests/mpl/baseline_images/mpl/test_ticks/yticks_cylindrical.png and b/lib/cartopy/tests/mpl/baseline_images/mpl/test_ticks/yticks_cylindrical.png differ
diff --git a/lib/cartopy/tests/mpl/baseline_images/mpl/test_ticks/yticks_no_transform.png b/lib/cartopy/tests/mpl/baseline_images/mpl/test_ticks/yticks_no_transform.png
index 6b0574149..622ae8be2 100644
Binary files a/lib/cartopy/tests/mpl/baseline_images/mpl/test_ticks/yticks_no_transform.png and b/lib/cartopy/tests/mpl/baseline_images/mpl/test_ticks/yticks_no_transform.png differ
diff --git a/lib/cartopy/tests/mpl/test_ticks.py b/lib/cartopy/tests/mpl/test_ticks.py
index d79d55f5c..2eb6c470e 100644
--- a/lib/cartopy/tests/mpl/test_ticks.py
+++ b/lib/cartopy/tests/mpl/test_ticks.py
@@ -11,12 +11,8 @@
 from cartopy.tests.mpl import ImageTesting
 
 
-ticks_tolerance = 7
-
-
 @pytest.mark.natural_earth
-@ImageTesting(['xticks_no_transform'],
-              tolerance=ticks_tolerance)
+@ImageTesting(['xticks_no_transform'])
 def test_set_xticks_no_transform():
     ax = plt.axes(projection=ccrs.PlateCarree())
     ax.coastlines('110m')
@@ -26,12 +22,9 @@ def test_set_xticks_no_transform():
 
 
 @pytest.mark.natural_earth
-@ImageTesting(['xticks_cylindrical'],
-              tolerance=ticks_tolerance)
+@ImageTesting(['xticks_cylindrical'])
 def test_set_xticks_cylindrical():
-    ax = plt.axes(projection=ccrs.Mercator(
-                  min_latitude=-85.,
-                  max_latitude=85.))
+    ax = plt.axes(projection=ccrs.Mercator(min_latitude=-85, max_latitude=85))
     ax.coastlines('110m')
     ax.xaxis.set_major_formatter(LongitudeFormatter(degree_symbol=''))
     ax.set_xticks([-180, -90, 0, 90, 180], crs=ccrs.PlateCarree())
@@ -48,27 +41,24 @@ def test_set_xticks_non_cylindrical():
 
 
 @pytest.mark.natural_earth
-@ImageTesting(['yticks_no_transform'],
-              tolerance=ticks_tolerance)
+@ImageTesting(['yticks_no_transform'])
 def test_set_yticks_no_transform():
     ax = plt.axes(projection=ccrs.PlateCarree())
     ax.coastlines('110m')
     ax.yaxis.set_major_formatter(LatitudeFormatter(degree_symbol=''))
     ax.set_yticks([-60, -30, 0, 30, 60])
-    ax.set_yticks([-75, -45, 15, 45, 75], minor=True)
+    ax.set_yticks([-75, -45, -15, 15, 45, 75], minor=True)
 
 
 @pytest.mark.natural_earth
-@ImageTesting(['yticks_cylindrical'],
-              tolerance=ticks_tolerance)
+@ImageTesting(['yticks_cylindrical'])
 def test_set_yticks_cylindrical():
-    ax = plt.axes(projection=ccrs.Mercator(
-                  min_latitude=-85.,
-                  max_latitude=85.))
+    ax = plt.axes(projection=ccrs.Mercator(min_latitude=-85, max_latitude=85))
     ax.coastlines('110m')
     ax.yaxis.set_major_formatter(LatitudeFormatter(degree_symbol=''))
     ax.set_yticks([-60, -30, 0, 30, 60], crs=ccrs.PlateCarree())
-    ax.set_yticks([-75, -45, 15, 45, 75], minor=True, crs=ccrs.PlateCarree())
+    ax.set_yticks([-75, -45, -15, 15, 45, 75], minor=True,
+                  crs=ccrs.PlateCarree())
 
 
 def test_set_yticks_non_cylindrical():
@@ -76,12 +66,13 @@ def test_set_yticks_non_cylindrical():
     with pytest.raises(RuntimeError):
         ax.set_yticks([-60, -30, 0, 30, 60], crs=ccrs.Geodetic())
     with pytest.raises(RuntimeError):
-        ax.set_yticks([-75, -45, 15, 45, 75], minor=True, crs=ccrs.Geodetic())
+        ax.set_yticks([-75, -45, -15, 15, 45, 75], minor=True,
+                      crs=ccrs.Geodetic())
     plt.close()
 
 
 @pytest.mark.natural_earth
-@ImageTesting(['xyticks'], tolerance=ticks_tolerance)
+@ImageTesting(['xyticks'])
 def test_set_xyticks():
     fig = plt.figure(figsize=(10, 10))
     projections = (ccrs.PlateCarree(),