diff --git a/src/func/instances/effect.rs b/src/func/instances/effect.rs
index 04d7483..2b6a24d 100644
--- a/src/func/instances/effect.rs
+++ b/src/func/instances/effect.rs
@@ -199,7 +199,7 @@ mod effect_tests {
                         Self::Sequential(aa.clone(), Self::Sequential(ab.clone(), b.clone()).into())
                             .simplify()
                     }
-                    a => Self::Sequential(a.simplify().clone(), b.simplify().clone()).into(),
+                    a => Self::Sequential(a.simplify(), b.simplify()).into(),
                 },
             }
         }