--- a/mfbt/tests/TestMaybe.cpp
+++ b/mfbt/tests/TestMaybe.cpp
@@ -762,18 +762,16 @@ TestVirtualFunction() {
 }
 
 static Maybe<int*>
 ReturnSomeNullptr()
 {
   return Some(nullptr);
 }
 
-
-
 static bool
 TestSomeNullptrConversion()
 {
   Maybe<int*> m1 = Some(nullptr);
   MOZ_RELEASE_ASSERT(m1.isSome());
   MOZ_RELEASE_ASSERT(m1);
   MOZ_RELEASE_ASSERT(!*m1);
 
@@ -785,23 +783,35 @@ TestSomeNullptrConversion()
   Maybe<decltype(nullptr)> m3 = Some(nullptr);
   MOZ_RELEASE_ASSERT(m3.isSome());
   MOZ_RELEASE_ASSERT(m3);
   MOZ_RELEASE_ASSERT(*m3 == nullptr);
 
   return true;
 }
 
+static bool
+TestBasePointerCoersion()
+{
+  MyDerivedClass foo;
+  const auto fnFoo = [&]() -> Maybe<MySuperClass*> {
+    return Some(&foo);
+  }
+  const auto bar = fnFoo();
+  return true;
+}
+
 int
 main()
 {
   RUN_TEST(TestBasicFeatures);
   RUN_TEST(TestCopyAndMove);
   RUN_TEST(TestFunctionalAccessors);
   RUN_TEST(TestApply);
   RUN_TEST(TestMap);
   RUN_TEST(TestToMaybe);
   RUN_TEST(TestComparisonOperators);
   RUN_TEST(TestVirtualFunction);
   RUN_TEST(TestSomeNullptrConversion);
+  RUN_TEST(TestBasePointerCoersion);
 
   return 0;
 }