diff --git a/pygears/bevel_tooth.py b/pygears/bevel_tooth.py
index 243ad7d..b7d6b2b 100644
--- a/pygears/bevel_tooth.py
+++ b/pygears/bevel_tooth.py
@@ -160,11 +160,3 @@ class BevelTooth(object):
                       pressure_angle=self.pressure_angle,
                       pitch_angle=self.pitch_angle,
                       backlash=self.backlash, module=self.module)
-
-
-if __name__ == "__main__":
-    from matplotlib import pyplot
-    gear = BevelTooth(z=60, clearance=0.0, pitch_angle=np.deg2rad(45))
-    x, y, z = gear.involute_points().T
-    pyplot.plot(x, y)
-    pyplot.show()
diff --git a/pygears/cycloide_tooth.py b/pygears/cycloide_tooth.py
index b1ec9fe..8a4f51b 100644
--- a/pygears/cycloide_tooth.py
+++ b/pygears/cycloide_tooth.py
@@ -105,15 +105,3 @@ class CycloideTooth():
         self.__init__(m=self.m, z=self.z, z1=self.z1, z2=self.z2,
                       clearance=self.clearance, backlash=self.backlash)
 
-
-if __name__ == "__main__":
-    from matplotlib import pyplot
-    gear = CycloideTooth()
-    x = []
-    y = []
-    for i in gear.points(30):
-        for j in i:
-            x.append(j[0])
-            y.append(j[1])
-    pyplot.plot(x[-60:], y[-60:])
-    pyplot.show()
diff --git a/pygears/involute_tooth.py b/pygears/involute_tooth.py
index fa188e6..10b03dd 100644
--- a/pygears/involute_tooth.py
+++ b/pygears/involute_tooth.py
@@ -219,16 +219,3 @@ class InvoluteRack(object):
 
         pitch = m * np.pi
         return m, m_n, pitch, pressure_angle_t
-
-
-
-if __name__ == "__main__":
-    from matplotlib import pyplot
-    gear = InvoluteRack()
-    x = []
-    y = []
-    for i in gear.points(30):
-        x.append(i[0])
-        y.append(i[1])
-    pyplot.plot(x, y)
-    pyplot.show()