diff --git a/Tests/test_file_libtiff.py b/Tests/test_file_libtiff.py
index 7f7ba1d63..a94257bc0 100644
--- a/Tests/test_file_libtiff.py
+++ b/Tests/test_file_libtiff.py
@@ -124,11 +124,21 @@ def test_write_metadata():
 
     for tag, value in reloaded.items():
         if tag not in ignored:
-            assert_equal(original[tag], value, "%s didn't roundtrip" % tag)
+            if tag.endswith('Resolution'):
+                val = original[tag]
+                assert_almost_equal(val[0][0]/val[0][1], value[0][0]/value[0][1],
+                                    msg="%s didn't roundtrip" % tag)
+            else:
+                assert_equal(original[tag], value, "%s didn't roundtrip" % tag)
 
     for tag, value in original.items():
         if tag not in ignored: 
-            assert_equal(value, reloaded[tag], "%s didn't roundtrip" % tag)
+            if tag.endswith('Resolution'):
+                val = reloaded[tag]
+                assert_almost_equal(val[0][0]/val[0][1], value[0][0]/value[0][1],
+                                    msg="%s didn't roundtrip" % tag)
+            else:
+                assert_equal(value, reloaded[tag], "%s didn't roundtrip" % tag)
 
 
 def test_g3_compression():
diff --git a/Tests/tester.py b/Tests/tester.py
index 5f322cc20..7252b5b47 100644
--- a/Tests/tester.py
+++ b/Tests/tester.py
@@ -67,6 +67,12 @@ def assert_equal(a, b, msg=None):
     else:
         failure(msg or "got %r, expected %r" % (a, b))
 
+def assert_almost_equal(a, b, msg=None, eps=1e-6):
+    if abs(a-b) < eps:
+        success()
+    else:
+        failure(msg or "got %r, expected %r" % (a, b))
+
 def assert_deep_equal(a, b, msg=None):
     try:
         if len(a) == len(b):