diff --git a/skimage/io/tests/test_simpleitk.py b/skimage/io/tests/test_simpleitk.py
index 4bb2cc23..2d4bd84b 100644
--- a/skimage/io/tests/test_simpleitk.py
+++ b/skimage/io/tests/test_simpleitk.py
@@ -1,6 +1,5 @@
 import os.path
 import numpy as np
-from numpy.testing import *
 from numpy.testing.decorators import skipif
 
 from tempfile import NamedTemporaryFile
@@ -90,4 +89,5 @@ class TestSave:
                     yield self.roundtrip, dtype, x
 
 if __name__ == "__main__":
+    from numpy.testing import run_module_suite
     run_module_suite()
diff --git a/skimage/measure/tests/test_find_contours.py b/skimage/measure/tests/test_find_contours.py
index 11b9b443..25de1e53 100644
--- a/skimage/measure/tests/test_find_contours.py
+++ b/skimage/measure/tests/test_find_contours.py
@@ -1,5 +1,7 @@
 import numpy as np
-from numpy.testing import *
+from numpy.testing import (assert_raises,
+                           assert_array_equal,
+                           )
 
 from skimage.measure import find_contours