diff --git a/pytest_localstack/constants.py b/pytest_localstack/constants.py
index 3a8f175..c5f981f 100644
--- a/pytest_localstack/constants.py
+++ b/pytest_localstack/constants.py
@@ -33,6 +33,7 @@
     "firehose": 4573,
     "iam": 4593,
     "kinesis": 4568,
+    "kms": 4599,
     "lambda": 4574,
     "logs": 4586,
     "redshift": 4577,
diff --git a/pytest_localstack/service_checks.py b/pytest_localstack/service_checks.py
index 3eeacce..32becad 100644
--- a/pytest_localstack/service_checks.py
+++ b/pytest_localstack/service_checks.py
@@ -126,6 +126,9 @@ def _f(client_response):
     "kinesis": botocore_check_response_type(
         "kinesis", "list_streams", list, "StreamNames"
     ),
+    "kms": botocore_check_response_type(
+        "kms", "list_keys", list, "Keys"
+    ),
     "lambda": botocore_check_response_type(
         "lambda", "list_functions", list, "Functions"
     ),