diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b2c84dc911ca607e8510a2631be6ef3f48bcce97..8f33e951e058875e420119bb6ed8ae634a28dcdf 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,3 +2,5 @@ unittests:
     script: python -m unittest discover tests -v
 core doctests:
     script: python -m doctest -v AmpScan/core.py
+registration doctests:
+    script: python -m doctest -v AmpScan/registration.py
\ No newline at end of file
diff --git a/AmpScan/registration.py b/AmpScan/registration.py
index ce105833a3fb265ab13a848510ac974a20121bce..b09c12a8fa04ab7deabe636634c2d241773f913a 100644
--- a/AmpScan/registration.py
+++ b/AmpScan/registration.py
@@ -6,7 +6,7 @@ Copyright: Joshua Steer 2018, Joshua.Steer@soton.ac.uk
 import numpy as np
 import copy
 from scipy import spatial
-from .core import AmpObject
+from AmpScan.core import AmpObject
 import matplotlib.pyplot as plt
 
 class registration(object):
@@ -36,9 +36,13 @@ class registration(object):
     
     Examples
     --------
+    >>> import os
+    >>> import AmpScan
+    >>> basefh = os.getcwd()+"\\tests\\stl_file.stl"
+    >>> targfh = os.getcwd()+"\\tests\\stl_file_2.stl"
     >>> baseline = AmpScan.AmpObject(basefh)
     >>> target = AmpScan.AmpObject(targfh)
-    >>> reg = AmpScan.registration(steps=10, neigh=10, smooth=1).reg
+    >>> reg = AmpScan.registration(baseline, target, steps=10, neigh=10, smooth=1).reg
 		
     """ 
     def __init__(self, baseline, target, method='point2plane', *args, **kwargs):
diff --git a/tests/doctests.py b/tests/doctests.py
deleted file mode 100644
index 66e71b292ca6427b699ea2ff4934eafa1a009b52..0000000000000000000000000000000000000000
--- a/tests/doctests.py
+++ /dev/null
@@ -1,8 +0,0 @@
-import AmpScan.core as core
-import AmpScan.trim as trim
-
-if __name__ == '__main__':
-    import doctest
-    doctest.testmod(core, verbose=True)
-    doctest.testmod(trim, verbose=True)
-
diff --git a/tests/stl_file_2.stl b/tests/stl_file_2.stl
new file mode 100644
index 0000000000000000000000000000000000000000..5b51ee5627b7a86e1dd011f6b0ffc5dbd5d564eb
--- /dev/null
+++ b/tests/stl_file_2.stl
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0bd80b6e237a78b9968f4649f415718e58f8ca7a10db759f8d6fa55115c2a826
+size 757084