diff --git a/tests/extensions.cpp b/tests/extensions.cpp
index ee5ae30..6712b3e 100644
--- a/tests/extensions.cpp
+++ b/tests/extensions.cpp
@@ -122,7 +122,7 @@ TEST_CASE("Monadic operations", "[monadic]") {
 
     // callable which returns a reference
     tl::optional<int> o38 = 42;
-    auto o38r = o38.map([](int& i) -> const int& { return i; });
+    auto o38r = o38.map([](int &i) -> const int & { return i; });
     REQUIRE(o38r);
     REQUIRE(*o38r == 42);
   }
diff --git a/tests/make_optional.cpp b/tests/make_optional.cpp
index 0376849..ba44fd9 100644
--- a/tests/make_optional.cpp
+++ b/tests/make_optional.cpp
@@ -41,4 +41,6 @@ TEST_CASE("Make optional", "[make_optional]") {
   auto i = 42;
   auto o6 = tl::make_optional<int&>(i);
   REQUIRE((std::is_same<decltype(o6), tl::optional<int&>>::value));
+  REQUIRE(o6);
+  REQUIRE(*o6 == 42);    
 }