diff --git a/anisotropy/shaping/bodyCentered.py b/anisotropy/shaping/bodyCentered.py
index 3dea258..5a32a21 100644
--- a/anisotropy/shaping/bodyCentered.py
+++ b/anisotropy/shaping/bodyCentered.py
@@ -146,7 +146,7 @@ class BodyCentered(Periodic):
             fNorm = self.normal(face)
             fAngle = self.angle(vecFlow, fNorm)
             
-            if fAngle == 0:
+            if fAngle == 0 or fAngle == numpy.pi:
                 if (face.center.pos() == inletface.center.pos()).prod():
                     face.name = "inlet"
 
diff --git a/anisotropy/shaping/faceCentered.py b/anisotropy/shaping/faceCentered.py
index 8aef95b..e7b7de6 100644
--- a/anisotropy/shaping/faceCentered.py
+++ b/anisotropy/shaping/faceCentered.py
@@ -153,7 +153,7 @@ class FaceCentered(Periodic):
             fNorm = self.normal(face)
             fAngle = self.angle(vecFlow, fNorm)
             
-            if fAngle == 0:
+            if fAngle == 0 or fAngle == numpy.pi:
                 if (face.center.pos() == inletface.center.pos()).prod():
                     face.name = "inlet"
 
diff --git a/anisotropy/shaping/simple.py b/anisotropy/shaping/simple.py
index 8818167..7acc3e2 100644
--- a/anisotropy/shaping/simple.py
+++ b/anisotropy/shaping/simple.py
@@ -140,11 +140,11 @@ class Simple(Periodic):
         for face in self.cell.faces:
             fNorm = self.normal(face)
             fAngle = self.angle(vecFlow, fNorm)
-            
-            if fAngle == 0:
+
+            if fAngle == 0 or fAngle == numpy.pi:
                 if (face.center.pos() == inletface.center.pos()).prod():
                     face.name = "inlet"
-
+                
                 else:
                     face.name = "outlet"
 
diff --git a/tests/test_core.py b/tests/test_core.py
index cb75a51..f3a5fd3 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -21,7 +21,8 @@ class TestCore(unittest.TestCase):
 
             self.core = core
 
-            self.outputPath = os.path.join(os.path.abspath("."), "tests/test_core_output")
+            self.currentPath = os.path.abspath(".")
+            self.outputPath = os.path.join(self.currentPath, "tests/test_core_output")
             os.makedirs(self.outputPath, exist_ok = True)
 
     def test_config(self):
@@ -54,12 +55,12 @@ class TestCore(unittest.TestCase):
         self.assertTrue(path.isfile(path.join(runner.casepath(), "mesh.mesh")))
 
         runner.computeFlow()
-        #self.assertTrue(path.isfile(path.join(runner.casepath(), "mesh.mesh")))
+        self.assertTrue(path.isfile(path.join(runner.casepath(), "mesh.mesh")))
 
         os.chdir(pathOld)
 
     def tearDown(self):
-        pass
+        os.chdir(self.currentPath)
 
 if __name__ == "__main__":
     unittest.main()