4 files changed, 31 insertions, 0 deletions
diff --git a/tests/specs/npm/cjs_import_dual/__test__.jsonc b/tests/specs/npm/cjs_import_dual/__test__.jsonc
new file mode 100644
index 000000000..83fbd15cc
--- /dev/null
+++ b/tests/specs/npm/cjs_import_dual/__test__.jsonc
@@ -0,0 +1,13 @@
+{
+  "tests": {
+    "run": {
+      "args": "run main.ts",
+      "output": "run.out"
+    },
+    "check": {
+      "args": "check --all main.ts",
+      "exitCode": 1,
+      "output": "check.out"
+    }
+  }
+}
diff --git a/tests/specs/npm/cjs_import_dual/check.out b/tests/specs/npm/cjs_import_dual/check.out
new file mode 100644
index 000000000..be1fe86a6
--- /dev/null
+++ b/tests/specs/npm/cjs_import_dual/check.out
@@ -0,0 +1,9 @@
+Download http://localhost:4260/@denotest/cjs-import-dual
+Download http://localhost:4260/@denotest/dual-cjs-esm
+Download http://localhost:4260/@denotest/cjs-import-dual/1.0.0.tgz
+Download http://localhost:4260/@denotest/dual-cjs-esm/1.0.0.tgz
+Check file:///[WILDLINE]/cjs_import_dual/main.ts
+error: TS2322 [ERROR]: Type '"cjs"' is not assignable to type '"esm"'.
+const kind: "esm" = getKind(); // should cause a type error
+      ~~~~
+    at file:///[WILDLINE]/cjs_import_dual/main.ts:3:7
diff --git a/tests/specs/npm/cjs_import_dual/main.ts b/tests/specs/npm/cjs_import_dual/main.ts
new file mode 100644
index 000000000..1a1bd4aed
--- /dev/null
+++ b/tests/specs/npm/cjs_import_dual/main.ts
@@ -0,0 +1,4 @@
+import { getKind } from "npm:@denotest/cjs-import-dual@1";
+
+const kind: "esm" = getKind(); // should cause a type error
+console.log(kind);
diff --git a/tests/specs/npm/cjs_import_dual/run.out b/tests/specs/npm/cjs_import_dual/run.out
new file mode 100644
index 000000000..2c05e125e
--- /dev/null
+++ b/tests/specs/npm/cjs_import_dual/run.out
@@ -0,0 +1,5 @@
+Download http://localhost:4260/@denotest/cjs-import-dual
+Download http://localhost:4260/@denotest/dual-cjs-esm
+Download http://localhost:4260/@denotest/cjs-import-dual/1.0.0.tgz
+Download http://localhost:4260/@denotest/dual-cjs-esm/1.0.0.tgz
+cjs