2 files changed, 15 insertions, 0 deletions
diff --git a/tests/specs/future/import_assertions/__test__.jsonc b/tests/specs/future/import_assertions/__test__.jsonc
index a1e759c75..1c55d2220 100644
--- a/tests/specs/future/import_assertions/__test__.jsonc
+++ b/tests/specs/future/import_assertions/__test__.jsonc
@@ -8,6 +8,15 @@
         "DENO_FUTURE": "1"
       }
     },
+    // Running the same multiple times, should warn each time.
+    {
+      "args": "run main.js",
+      "output": "error.out",
+      "exitCode": 1,
+      "envs": {
+        "DENO_FUTURE": "1"
+      }
+    },
     {
       "args": "run main.js",
       "output": "success.out"
diff --git a/tests/specs/future/import_assertions/success.out b/tests/specs/future/import_assertions/success.out
index 70ec274d9..fcf28b943 100644
--- a/tests/specs/future/import_assertions/success.out
+++ b/tests/specs/future/import_assertions/success.out
@@ -1 +1,7 @@
+⚠️  Import assertions are deprecated. Use `with` keyword, instead of 'assert' keyword.
+
+import foo from "./main.json" assert { type: "json" };
+
+  at [WILDCARD]import_assertions/main.js:1:30
+
 { foo: "foo" }