diff --git a/orbitdeterminator/doppler/__init__.py b/orbitdeterminator/doppler/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/orbitdeterminator/doppler/archive/__init__.py b/orbitdeterminator/doppler/archive/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/orbitdeterminator/doppler/archive/test_old.py b/orbitdeterminator/doppler/archive/test_old.py
index 5b94f205..b3a0b605 100644
--- a/orbitdeterminator/doppler/archive/test_old.py
+++ b/orbitdeterminator/doppler/archive/test_old.py
@@ -1,7 +1,7 @@
 import unittest
 import numpy as np
 
-from orbdet.archive.utils_astro import *
+from .utils_astro import *
 
 class TestTransformations(unittest.TestCase):
     """ Unit test for coordinate system transofrmations.
diff --git a/orbitdeterminator/doppler/archive/utils_astro.py b/orbitdeterminator/doppler/archive/utils_astro.py
index 44b883ef..c514bc40 100644
--- a/orbitdeterminator/doppler/archive/utils_astro.py
+++ b/orbitdeterminator/doppler/archive/utils_astro.py
@@ -1,7 +1,7 @@
 import numpy as np
 from math import fmod, pi, floor, sqrt
 
-from orbdet.utils.constants import *
+from orbitdeterminator.doppler.utils.constants import *
 
 # def get_jd(date):
 #     """ Obtain Julian Day given date.
diff --git a/orbitdeterminator/doppler/tests/__init__.py b/orbitdeterminator/doppler/tests/__init__.py
new file mode 100644
index 00000000..e69de29b