diff --git a/tests/cases/conformance/classes/classDeclarations/mergeClassInterfaceAndModule.ts b/tests/cases/conformance/classes/classDeclarations/mergeClassInterfaceAndModule.ts
new file mode 100644
index 00000000000..4dc733d28c0
--- /dev/null
+++ b/tests/cases/conformance/classes/classDeclarations/mergeClassInterfaceAndModule.ts
@@ -0,0 +1,16 @@
+
+interface C1 {}
+declare class C1 {}
+module C1 {}
+
+declare class C2 {}
+interface C2 {}
+module C2 {}
+
+declare class C3 {}
+module C3 {}
+interface C3 {}
+
+module C4 {}
+declare class C4 {} // error -- class declaration must preceed module declaration
+interface C4 {}
\ No newline at end of file