diff --git a/pyCHX/chx_crosscor.py b/pyCHX/chx_crosscor.py
index 738be4e..c95d417 100644
--- a/pyCHX/chx_crosscor.py
+++ b/pyCHX/chx_crosscor.py
@@ -350,7 +350,6 @@ def _centered(img, sz):
     asarray,
     atleast_1d,
     atleast_2d,
-    cast,
     dot,
     exp,
     expand_dims,
@@ -369,7 +368,6 @@ def _centered(img, sz):
     polysub,
     polyval,
     prod,
-    product,
     r_,
     ravel,
     real_if_close,
diff --git a/pyCHX/tests/test_simpleimport.py b/pyCHX/tests/test_simpleimport.py
new file mode 100644
index 0000000..14d4729
--- /dev/null
+++ b/pyCHX/tests/test_simpleimport.py
@@ -0,0 +1,3 @@
+def test_import():
+    "Check that the main pyCHX imports work"
+    from pyCHX.chx_packages import *