Pass the failing test

Author: Sayam753

pymc3/distributions/simulator.py

@@ -115,10 +115,10 @@ def random(self, point=None, size=None):
         array
         """
         params = draw_values([*self.params], point=point, size=size)
-        if size is None:
+        if not size:
             return self.function(*params)
         else:
-            return np.array([self.function(*params) for _ in range(size)])
+            return np.array([self.function(*params) for _ in range(size[0])])
 
     def _str_repr(self, name=None, dist=None, formatting="plain"):
         if dist is None: