diff --git a/tests/files/typescript-export-assign-function.ts b/tests/files/typescript-export-assign-function.ts
new file mode 100644
index 0000000000..930d6dacee
--- /dev/null
+++ b/tests/files/typescript-export-assign-function.ts
@@ -0,0 +1 @@
+export = function foo() {};
diff --git a/tests/src/rules/default.js b/tests/src/rules/default.js
index d3d4aae4a7..c040a478d5 100644
--- a/tests/src/rules/default.js
+++ b/tests/src/rules/default.js
@@ -174,6 +174,14 @@ context('TypeScript', function () {
               'import/resolver': { 'eslint-import-resolver-typescript': true },
             },
           }),
+          test({
+            code: `import foobar from "./typescript-export-assign-function"`,
+            parser: parser,
+            settings: {
+              'import/parsers': { [parser]: ['.ts'] },
+              'import/resolver': { 'eslint-import-resolver-typescript': true },
+            },
+          }),
           test({
             code: `import foobar from "./typescript-export-assign-mixed"`,
             parser: parser,