1 files changed, 10 insertions, 0 deletions
diff --git a/tests/unit_node/process_test.ts b/tests/unit_node/process_test.ts
index add9e1280..0e0f169d6 100644
--- a/tests/unit_node/process_test.ts
+++ b/tests/unit_node/process_test.ts
@@ -691,6 +691,16 @@ Deno.test({
       assertStrictEquals(process.stdout.clearLine, undefined);
       assertStrictEquals(process.stdout.clearScreenDown, undefined);
     }
+
+    // Allows overwriting `process.stdout.isTTY`
+    // https://github.com/denoland/deno/issues/26123
+    const original = process.stdout.isTTY;
+    try {
+      process.stdout.isTTY = !isTTY;
+      assertEquals(process.stdout.isTTY, !isTTY);
+    } finally {
+      process.stdout.isTTY = original;
+    }
   },
 });