3 files changed, 16 insertions, 0 deletions
diff --git a/testsuite/tests/ado/T22483.hs b/testsuite/tests/ado/T22483.hs
new file mode 100644
index 0000000000..31d2f72add
--- /dev/null
+++ b/testsuite/tests/ado/T22483.hs
@@ -0,0 +1,7 @@
+main = do
+  let x = ()
+  res2 <- pure ()
+  ~(Just res1) <- seq x (pure $ Nothing @())
+  print res1
+  print res2
+  pure ()
diff --git a/testsuite/tests/ado/T22483.stderr b/testsuite/tests/ado/T22483.stderr
new file mode 100644
index 0000000000..2428c31ea9
--- /dev/null
+++ b/testsuite/tests/ado/T22483.stderr
@@ -0,0 +1,8 @@
+
+T22483.hs:1:1: warning: [GHC-38417] [-Wmissing-signatures (in -Wall)]
+    Top-level binding with no type signature: main :: IO ()
+
+T22483.hs:4:3: warning: [GHC-62161] [-Wincomplete-uni-patterns (in -Wall)]
+    Pattern match(es) are non-exhaustive
+    In a pattern binding:
+        Patterns of type ‘Maybe ()’ not matched: Nothing
diff --git a/testsuite/tests/ado/all.T b/testsuite/tests/ado/all.T
index 7bd416a570..4159ebd8b1 100644
--- a/testsuite/tests/ado/all.T
+++ b/testsuite/tests/ado/all.T
@@ -21,3 +21,4 @@ test('T16628', normal, compile_fail, [''])
 test('T17835', normal, compile, [''])
 test('T20540', normal, compile, [''])
 test('T16135', when(compiler_debugged(),expect_broken(16135)), compile, [''])
+test('T22483', normal, compile, ['-Wall'])