diff --git a/lib/matplotlib/tests/test_axes.py b/lib/matplotlib/tests/test_axes.py
index 8e22e6495715..d8e007ff1fd0 100644
--- a/lib/matplotlib/tests/test_axes.py
+++ b/lib/matplotlib/tests/test_axes.py
@@ -2747,7 +2747,7 @@ def test_subplot_key_hash():
 
 @image_comparison(baseline_images=['specgram_freqs',
                                    'specgram_freqs_linear'],
-                  remove_text=True, extensions=['png'], tol=0.01)
+                  remove_text=True, extensions=['png'], tol=0.03)
 def test_specgram_freqs():
     '''test axes.specgram in default (psd) mode with sinusoidal stimuli'''
     n = 10000
@@ -2847,7 +2847,7 @@ def test_specgram_noise():
 
 @image_comparison(baseline_images=['specgram_magnitude_freqs',
                                    'specgram_magnitude_freqs_linear'],
-                  remove_text=True, extensions=['png'], tol=0.01)
+                  remove_text=True, extensions=['png'], tol=0.03)
 def test_specgram_magnitude_freqs():
     '''test axes.specgram in magnitude mode with sinusoidal stimuli'''
     n = 10000