diff --git a/tslang/test/tester/CMakeLists.txt b/tslang/test/tester/CMakeLists.txt
index 157a2cf3..8fa42a21 100644
--- a/tslang/test/tester/CMakeLists.txt
+++ b/tslang/test/tester/CMakeLists.txt
@@ -868,6 +868,7 @@ add_test(NAME test-compile-shared-export-import-object-literal-structural-typed-
 add_test(NAME test-compile-shared-export-import-object-literal-structural-typed-extends-interface COMMAND test-runner -shared -gctors-as-method "${PROJECT_SOURCE_DIR}/test/tester/tests/import_object_literal_structural_typed_extends_interface.ts" "${PROJECT_SOURCE_DIR}/test/tester/tests/export_object_literal_structural_typed_extends_interface.ts")
 add_test(NAME test-compile-shared-export-import-object-literal-structural-typed-extends-interface-multilevel COMMAND test-runner -shared -gctors-as-method "${PROJECT_SOURCE_DIR}/test/tester/tests/import_object_literal_structural_typed_extends_interface_multilevel.ts" "${PROJECT_SOURCE_DIR}/test/tester/tests/export_object_literal_structural_typed_extends_interface_multilevel.ts")
 add_test(NAME test-compile-shared-export-import-object-literal-structural-typed-extends-interface-diamond COMMAND test-runner -shared -gctors-as-method "${PROJECT_SOURCE_DIR}/test/tester/tests/import_object_literal_structural_typed_extends_interface_diamond.ts" "${PROJECT_SOURCE_DIR}/test/tester/tests/export_object_literal_structural_typed_extends_interface_diamond.ts")
+add_test(NAME test-compile-shared-export-import-object-literal-structural-typed-extends-interface-triple COMMAND test-runner -shared -gctors-as-method "${PROJECT_SOURCE_DIR}/test/tester/tests/import_object_literal_structural_typed_extends_interface_triple.ts" "${PROJECT_SOURCE_DIR}/test/tester/tests/export_object_literal_structural_typed_extends_interface_triple.ts")
 add_test(NAME test-compile-shared-export-import-vars COMMAND test-runner -shared "${PROJECT_SOURCE_DIR}/test/tester/tests/import_vars.ts" "${PROJECT_SOURCE_DIR}/test/tester/tests/export_vars.ts")
 add_test(NAME test-compile-shared-export-import-vars-2 COMMAND test-runner -shared -gctors-as-method "${PROJECT_SOURCE_DIR}/test/tester/tests/import_vars2.ts" "${PROJECT_SOURCE_DIR}/test/tester/tests/export_vars2.ts")
 add_test(NAME test-compile-shared-export-import-enum COMMAND test-runner -shared "${PROJECT_SOURCE_DIR}/test/tester/tests/import_enum.ts" "${PROJECT_SOURCE_DIR}/test/tester/tests/export_enum.ts")
@@ -892,6 +893,7 @@ add_test(NAME test-jit-shared-export-import-object-literal-structural-typed-inte
 add_test(NAME test-jit-shared-export-import-object-literal-structural-typed-extends-interface COMMAND test-runner -jit -shared -gctors-as-method "${PROJECT_SOURCE_DIR}/test/tester/tests/import_object_literal_structural_typed_extends_interface.ts" "${PROJECT_SOURCE_DIR}/test/tester/tests/export_object_literal_structural_typed_extends_interface.ts")
 add_test(NAME test-jit-shared-export-import-object-literal-structural-typed-extends-interface-multilevel COMMAND test-runner -jit -shared -gctors-as-method "${PROJECT_SOURCE_DIR}/test/tester/tests/import_object_literal_structural_typed_extends_interface_multilevel.ts" "${PROJECT_SOURCE_DIR}/test/tester/tests/export_object_literal_structural_typed_extends_interface_multilevel.ts")
 add_test(NAME test-jit-shared-export-import-object-literal-structural-typed-extends-interface-diamond COMMAND test-runner -jit -shared -gctors-as-method "${PROJECT_SOURCE_DIR}/test/tester/tests/import_object_literal_structural_typed_extends_interface_diamond.ts" "${PROJECT_SOURCE_DIR}/test/tester/tests/export_object_literal_structural_typed_extends_interface_diamond.ts")
+add_test(NAME test-jit-shared-export-import-object-literal-structural-typed-extends-interface-triple COMMAND test-runner -jit -shared -gctors-as-method "${PROJECT_SOURCE_DIR}/test/tester/tests/import_object_literal_structural_typed_extends_interface_triple.ts" "${PROJECT_SOURCE_DIR}/test/tester/tests/export_object_literal_structural_typed_extends_interface_triple.ts")
 add_test(NAME test-jit-shared-export-import-vars COMMAND test-runner -jit -shared "${PROJECT_SOURCE_DIR}/test/tester/tests/import_vars.ts" "${PROJECT_SOURCE_DIR}/test/tester/tests/export_vars.ts")
 add_test(NAME test-jit-shared-export-import-vars-2 COMMAND test-runner -jit -shared -gctors-as-method "${PROJECT_SOURCE_DIR}/test/tester/tests/import_vars2.ts" "${PROJECT_SOURCE_DIR}/test/tester/tests/export_vars2.ts")
 add_test(NAME test-jit-shared-export-import-enum COMMAND test-runner -jit -shared "${PROJECT_SOURCE_DIR}/test/tester/tests/import_enum.ts" "${PROJECT_SOURCE_DIR}/test/tester/tests/export_enum.ts")
diff --git a/tslang/test/tester/tests/export_object_literal_structural_typed_extends_interface_triple.ts b/tslang/test/tester/tests/export_object_literal_structural_typed_extends_interface_triple.ts
new file mode 100644
index 00000000..5f8a6d03
--- /dev/null
+++ b/tslang/test/tester/tests/export_object_literal_structural_typed_extends_interface_triple.ts
@@ -0,0 +1,38 @@
+namespace M3 {
+    export interface A {
+        a: number;
+        addA(n: number): void;
+    }
+    export interface B {
+        b: number;
+        addB(n: number): void;
+    }
+    export interface C {
+        c: number;
+        addC(n: number): void;
+    }
+    export interface Combined extends A, B, C {
+        combined: number;
+        addCombined(n: number): void;
+    }
+
+    export var rawCombined: {
+        a: number;
+        addA(n: number): void;
+        b: number;
+        addB(n: number): void;
+        c: number;
+        addC(n: number): void;
+        combined: number;
+        addCombined(n: number): void;
+    } = {
+        a: 1.0,
+        addA(n: number) { this.a = this.a + n; },
+        b: 2.0,
+        addB(n: number) { this.b = this.b + n; },
+        c: 3.0,
+        addC(n: number) { this.c = this.c + n; },
+        combined: 4.0,
+        addCombined(n: number) { this.combined = this.combined + n; },
+    };
+}
diff --git a/tslang/test/tester/tests/import_object_literal_structural_typed_extends_interface_triple.ts b/tslang/test/tester/tests/import_object_literal_structural_typed_extends_interface_triple.ts
new file mode 100644
index 00000000..aad925a2
--- /dev/null
+++ b/tslang/test/tester/tests/import_object_literal_structural_typed_extends_interface_triple.ts
@@ -0,0 +1,21 @@
+import './export_object_literal_structural_typed_extends_interface_triple'
+
+let combined: M3.Combined = <M3.Combined>M3.rawCombined;
+
+combined.addA(10);
+assert(combined.a == 11);
+print(combined.a);
+
+combined.addB(20);
+assert(combined.b == 22);
+print(combined.b);
+
+combined.addC(30);
+assert(combined.c == 33);
+print(combined.c);
+
+combined.addCombined(40);
+assert(combined.combined == 44);
+print(combined.combined);
+
+print("done.");