diff --git a/tests/test_commands.py b/tests/test_commands.py
index 31db8c51..085f74c4 100644
--- a/tests/test_commands.py
+++ b/tests/test_commands.py
@@ -1330,6 +1330,8 @@ def test_getdel(self, r):
     @skip_if_server_version_lt("6.2.0")
     def test_getex(self, r):
         r.set("a", 1)
+        with pytest.raises(valkey.DataError):
+            r.getex("a", ex=10, px=10)
         assert r.getex("a") == b"1"
         assert r.ttl("a") == -1
         assert r.getex("a", ex=60) == b"1"
diff --git a/valkey/commands/core.py b/valkey/commands/core.py
index 35af510c..93160f9b 100644
--- a/valkey/commands/core.py
+++ b/valkey/commands/core.py
@@ -1859,8 +1859,8 @@ def getex(
         For more information see https://valkey.io/commands/getex
         """
 
-        opset = {ex, px, exat, pxat}
-        if len(opset) > 2 or len(opset) > 1 and persist:
+        opvs = sum(op is not None for op in [ex, px, exat, pxat])
+        if opvs > 1 or (opvs and persist):
             raise DataError(
                 "``ex``, ``px``, ``exat``, ``pxat``, "
                 "and ``persist`` are mutually exclusive."