diff --git a/transforms3d/axangles.py b/transforms3d/axangles.py
index e5d2109..510e21f 100644
--- a/transforms3d/axangles.py
+++ b/transforms3d/axangles.py
@@ -107,7 +107,7 @@ def axangle2aff(axis, angle, point=None):
     M[:3,:3] = R
     if point is not None:
         # rotation not around origin
-        point = np.array(point[:3], dtype=np.float64, copy=False)
+        point = np.array(point[:3], dtype=np.float64)
         M[:3, 3] = point - np.dot(R, point)
     return M
 
diff --git a/transforms3d/conftest.py b/transforms3d/conftest.py
index da37efe..377d068 100644
--- a/transforms3d/conftest.py
+++ b/transforms3d/conftest.py
@@ -1,9 +1,9 @@
 """ Configuration for py.test test run
 """
 
-def pytest_ignore_collect(path, config):
+def pytest_ignore_collect(collection_path, config):
     """ Skip the origin Gohlke transforms for doctests.
 
     That file needs some specific doctest setup.
     """
-    return path.basename == '_gohlketransforms.py'
+    return collection_path.name == '_gohlketransforms.py'
diff --git a/transforms3d/quaternions.py b/transforms3d/quaternions.py
index 110bc2a..7dd20d1 100644
--- a/transforms3d/quaternions.py
+++ b/transforms3d/quaternions.py
@@ -23,7 +23,6 @@
 import math
 import numpy as np
 
-_MAX_FLOAT = np.maximum_sctype(np.float64)
 _FLOAT_EPS = np.finfo(np.float64).eps
 
 
@@ -86,7 +85,7 @@ def fillpositive(xyz, w2_thresh=None):
         except (AttributeError, ValueError):
             w2_thresh = -_FLOAT_EPS * 3
     # Use maximum precision
-    xyz = np.asarray(xyz, dtype=_MAX_FLOAT)
+    xyz = np.asarray(xyz, dtype=np.float64)
     # Calculate w
     w2 = 1.0 - np.dot(xyz, xyz)
     if w2 < 0: