1 files changed, 16 insertions, 0 deletions
diff --git a/cli/tests/unit/os_test.ts b/cli/tests/unit/os_test.ts
index 9698692c7..deb0385a8 100644
--- a/cli/tests/unit/os_test.ts
+++ b/cli/tests/unit/os_test.ts
@@ -326,6 +326,22 @@ unitTest({ perms: { env: false } }, function hostnamePerm(): void {
   assert(caughtError);
 });
 
+unitTest({ perms: { env: true } }, function osName(): void {
+  assertNotEquals(Deno.osName(), "");
+});
+
+unitTest({ perms: { env: false } }, function osNamePerm(): void {
+  let caughtError = false;
+  try {
+    Deno.osName();
+  } catch (err) {
+    caughtError = true;
+    assert(err instanceof Deno.errors.PermissionDenied);
+    assertEquals(err.name, "PermissionDenied");
+  }
+  assert(caughtError);
+});
+
 unitTest({ perms: { env: true } }, function releaseDir(): void {
   assertNotEquals(Deno.osRelease(), "");
 });