Change made-up string argument to be more consistent.
@@ -183,7 +183,7 @@ def test_cosmology_init():
# Make sure error raised if incorrect type of Parameters object passed
assert_raises(TypeError, ccl.Cosmology, params=params.parameters)
- assert_raises(TypeError, ccl.Cosmology, params="xx")
+ assert_raises(TypeError, ccl.Cosmology, params="x")
# Make sure error raised if wrong config type passed
assert_raises(TypeError, ccl.Cosmology, params=params, config="string")
