diff --git a/src/openrct2/Context.cpp b/src/openrct2/Context.cpp
index 6e7a92fd44..2bd2ea66a9 100644
--- a/src/openrct2/Context.cpp
+++ b/src/openrct2/Context.cpp
@@ -134,6 +134,9 @@ namespace OpenRCT2
             , _uiContext(uiContext)
             , _localisationService(std::make_unique<LocalisationService>(env))
         {
+            // Can't have more than one context currently.
+            Guard::Assert(Instance == nullptr);
+
             Instance = this;
         }
 
diff --git a/test/tests/TileElements.cpp b/test/tests/TileElements.cpp
index 738f3c2971..5456a0cf2a 100644
--- a/test/tests/TileElements.cpp
+++ b/test/tests/TileElements.cpp
@@ -36,6 +36,12 @@ protected:
         SUCCEED();
     }
 
+    static void TearDownTestCase()
+    {
+        if (_context)
+            _context.reset();
+    }
+
 private:
     static std::shared_ptr<IContext> _context;
 };