diff --git a/packages/forge2d/lib/src/collision/distance.dart b/packages/forge2d/lib/src/collision/distance.dart
index 9bbda36..8b5bbdd 100644
--- a/packages/forge2d/lib/src/collision/distance.dart
+++ b/packages/forge2d/lib/src/collision/distance.dart
@@ -501,8 +501,6 @@ class DistanceProxy {
         _count = 2;
         radius = edge.radius;
         break;
-      default:
-        assert(false);
     }
   }
 
diff --git a/packages/forge2d/lib/src/collision/time_of_impact.dart b/packages/forge2d/lib/src/collision/time_of_impact.dart
index dd85b32..d2f2105 100644
--- a/packages/forge2d/lib/src/collision/time_of_impact.dart
+++ b/packages/forge2d/lib/src/collision/time_of_impact.dart
@@ -411,11 +411,6 @@ class SeparationFunction {
         _pointA.setFrom(Transform.mulVec2(_xfa, _localPointA));
 
         return (_pointA..sub(_pointB)).dot(_normal);
-      default:
-        assert(false);
-        indexes[0] = -1;
-        indexes[1] = -1;
-        return 0.0;
     }
   }
 
@@ -447,9 +442,6 @@ class SeparationFunction {
         _pointA.setFrom(Transform.mulVec2(_xfa, _localPointA));
 
         return (_pointA..sub(_pointB)).dot(_normal);
-      default:
-        assert(false);
-        return 0.0;
     }
   }
 }
diff --git a/packages/forge2d/lib/src/dynamics/fixture.dart b/packages/forge2d/lib/src/dynamics/fixture.dart
index 3df380d..902fe84 100644
--- a/packages/forge2d/lib/src/dynamics/fixture.dart
+++ b/packages/forge2d/lib/src/dynamics/fixture.dart
@@ -321,8 +321,6 @@ class Fixture {
           }
         }
         break;
-      default:
-        break;
     }
   }
 }