diff --git a/lib/matplotlib/tests/test_backend_pgf.py b/lib/matplotlib/tests/test_backend_pgf.py
index c635b280ef84..4868609f84fd 100644
--- a/lib/matplotlib/tests/test_backend_pgf.py
+++ b/lib/matplotlib/tests/test_backend_pgf.py
@@ -168,7 +168,9 @@ def test_pathclip():
 @needs_xelatex
 @pytest.mark.backend('pgf')
 @image_comparison(['pgf_mixedmode.pdf'], style='default',
-                  tol={'aarch64': 1.086}.get(platform.machine(), 0.0))
+                  tol={'aarch64': 1.086, 'x86_64': 1.086}.get(
+                      platform.machine(), 0.0
+                      ))
 def test_mixedmode():
     rc_xelatex = {'font.family': 'serif',
                   'pgf.rcfonts': False}
diff --git a/lib/matplotlib/tests/test_usetex.py b/lib/matplotlib/tests/test_usetex.py
index 1b7b76bfc0f2..36c8515d1e0c 100644
--- a/lib/matplotlib/tests/test_usetex.py
+++ b/lib/matplotlib/tests/test_usetex.py
@@ -12,7 +12,9 @@
 
 @image_comparison(baseline_images=['test_usetex'],
                   extensions=['pdf', 'png'],
-                  tol={'aarch64': 2.868}.get(platform.machine(), 0.3))
+                  tol={'aarch64': 2.868, 'x86_64': 2.868}.get(
+                      platform.machine(), 0.3
+                      ))
 def test_usetex():
     mpl.rcParams['text.usetex'] = True
     fig = plt.figure()