diff --git a/bob/bio/face/test/test_extractors.py b/bob/bio/face/test/test_extractors.py
index e1dfc0762f34f152a17ee360ef7fa880f0859180..97fee729e69b38eb216678e5d1b67cacd04753dd 100644
--- a/bob/bio/face/test/test_extractors.py
+++ b/bob/bio/face/test/test_extractors.py
@@ -33,14 +33,14 @@ import pkg_resources
 
 regenerate_refs = False
 
-def _compare(data, reference, write_function = bob.bio.base.save, read_function = bob.bio.base.load):
+def _compare(data, reference, write_function = bob.bio.base.save, read_function = bob.bio.base.load, atol = 1e-5, rtol = 1e-8):
   # write reference?
   if regenerate_refs:
     write_function(data, reference)
 
   # compare reference
   reference = read_function(reference)
-  assert numpy.allclose(data, reference, atol=1e-5)
+  assert numpy.allclose(data, reference, atol=atol, rtol=rtol)
 
 def _data():
   return bob.bio.base.load(pkg_resources.resource_filename('bob.bio.face.test', 'data/cropped.hdf5'))
diff --git a/bob/bio/face/test/test_preprocessors.py b/bob/bio/face/test/test_preprocessors.py
index 1495394788bf7d8bc32d648bea1526fbc26bf3ec..815b74bfffd0487bfcedc0733abd9d29b0b3ce8c 100644
--- a/bob/bio/face/test/test_preprocessors.py
+++ b/bob/bio/face/test/test_preprocessors.py
@@ -33,14 +33,14 @@ import bob.bio.face
 import bob.db.verification.utils
 
 
-def _compare(data, reference, write_function = bob.bio.base.save, read_function = bob.bio.base.load):
+def _compare(data, reference, write_function = bob.bio.base.save, read_function = bob.bio.base.load, atol = 1e-5, rtol = 1e-8):
   # write reference?
   if regenerate_refs:
     write_function(data, reference)
 
   # compare reference
   reference = read_function(reference)
-  assert numpy.allclose(data, reference, atol=1e-5)
+  assert numpy.allclose(data, reference, atol=atol, rtol=rtol)
 
 
 def _image():