diff --git a/src/embed_tests/Events.cs b/src/embed_tests/Events.cs
index cc51176dc..d2f43ea50 100644
--- a/src/embed_tests/Events.cs
+++ b/src/embed_tests/Events.cs
@@ -48,6 +48,12 @@ public ClassWithEventHandler()
         this.arr = new int[800];
     }
 
+    // Reference LeakEvent to silence warning
+    protected virtual void OnLeakEvent(EventArgs e)
+    {
+        LeakEvent?.Invoke(this, e);
+    }
+
     ~ClassWithEventHandler()
     {
         Interlocked.Decrement(ref alive);
diff --git a/src/runtime/PythonTypes/PyFloat.cs b/src/runtime/PythonTypes/PyFloat.cs
index 50621d5c2..379228f29 100644
--- a/src/runtime/PythonTypes/PyFloat.cs
+++ b/src/runtime/PythonTypes/PyFloat.cs
@@ -103,5 +103,7 @@ public static PyFloat AsFloat(PyObject value)
         public double ToDouble() => Runtime.PyFloat_AsDouble(obj);
 
         public override TypeCode GetTypeCode() => TypeCode.Double;
+
+        public override int GetHashCode() => base.GetHashCode();
     }
 }
diff --git a/src/runtime/PythonTypes/PyInt.cs b/src/runtime/PythonTypes/PyInt.cs
index 0d00f5a13..7ab7f9ec1 100644
--- a/src/runtime/PythonTypes/PyInt.cs
+++ b/src/runtime/PythonTypes/PyInt.cs
@@ -232,5 +232,7 @@ public string ToString(string format, IFormatProvider formatProvider)
         }
 
         public override TypeCode GetTypeCode() => TypeCode.Int64;
+
+        public override int GetHashCode() => base.GetHashCode();
     }
 }
diff --git a/src/runtime/Util/ReflectionPolyfills.cs b/src/runtime/Util/ReflectionPolyfills.cs
index b33698509..4bdf687c8 100644
--- a/src/runtime/Util/ReflectionPolyfills.cs
+++ b/src/runtime/Util/ReflectionPolyfills.cs
@@ -14,7 +14,7 @@ public static AssemblyBuilder DefineDynamicAssembly(this AppDomain _, AssemblyNa
 
         public static Type CreateType(this TypeBuilder typeBuilder)
         {
-            return typeBuilder.CreateTypeInfo();
+            return typeBuilder.CreateTypeInfo()!;
         }
 
         public static T GetCustomAttribute<T>(this Type type) where T: Attribute