diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 6e82561c5..d4c6923d9 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -115,13 +115,6 @@ Pytest:
     - release
 
 ###################################################################################################
-OrientationRelationship:
-  stage: preprocessing
-  script: OrientationRelationship/test.py
-  except:
-    - master
-    - release
-
 Pre_SeedGeneration:
   stage: preprocessing
   script: PreProcessing_SeedGeneration/test.py
diff --git a/python/damask/orientation.py b/python/damask/orientation.py
index fc601b608..65318f169 100644
--- a/python/damask/orientation.py
+++ b/python/damask/orientation.py
@@ -1025,7 +1025,7 @@ class Lattice:
     https://doi.org/10.1016/j.actamat.2004.11.021
 
     """
-    models={'KS':self.KS, 'GT':self.GT, "GT'":self.GTprime, 
+    models={'KS':self.KS, 'GT':self.GT, 'GT_prime':self.GTprime, 
             'NW':self.NW, 'Pitsch': self.Pitsch, 'Bain':self.Bain}
     try:
       relationship = models[model]
diff --git a/python/tests/test_Rotation.py b/python/tests/test_Rotation.py
index 72956c013..79d674bcd 100644
--- a/python/tests/test_Rotation.py
+++ b/python/tests/test_Rotation.py
@@ -2,6 +2,7 @@ import pytest
 import numpy as np
 
 from damask import Rotation
+from damask import Orientation
    
 n = 1000
 
@@ -18,38 +19,43 @@ class TestRotation:
             assert np.allclose(rot.asQuaternion(), 
                                Rotation.fromEulers(rot.asEulers()).asQuaternion())
 
-
     def test_AxisAngle(self,default):
         for rot in default:
             assert np.allclose(rot.asEulers(),
                                Rotation.fromAxisAngle(rot.asAxisAngle()).asEulers())
 
-
     def test_Matrix(self,default):
         for rot in default:
             assert np.allclose(rot.asAxisAngle(),
                                Rotation.fromMatrix(rot.asMatrix()).asAxisAngle())
 
-
     def test_Rodriques(self,default):
         for rot in default:
             assert np.allclose(rot.asMatrix(),
                                Rotation.fromRodrigues(rot.asRodrigues()).asMatrix())
 
-
     def test_Homochoric(self,default):
         for rot in default:
             assert np.allclose(rot.asRodrigues(),
                                Rotation.fromHomochoric(rot.asHomochoric()).asRodrigues())
 
-
     def test_Cubochoric(self,default):
         for rot in default:
             assert np.allclose(rot.asHomochoric(),
                                Rotation.fromCubochoric(rot.asCubochoric()).asHomochoric())
 
-
     def test_Quaternion(self,default):
         for rot in default:
             assert np.allclose(rot.asCubochoric(),
                                Rotation.fromQuaternion(rot.asQuaternion()).asCubochoric())
+
+
+    @pytest.mark.parametrize('model',['Bain','KS','GT','GT_prime','NW','Pitsch'])
+    @pytest.mark.parametrize('lattice',['fcc','bcc'])
+    def test_relationship_forward_backward(self,model,lattice):
+        ori = Orientation(Rotation.fromRandom(),lattice)
+        for i,r in enumerate(ori.relatedOrientations(model)):
+            ori2 = r.relatedOrientations(model)[i]
+            misorientation = ori.rotation.misorientation(ori2.rotation)
+            assert misorientation.asAxisAngle(degrees=True)[3]<1.0e-5
+