diff --git a/scripts/implementation_coverage.py b/scripts/implementation_coverage.py
index 245784cb0..9ec6e028f 100755
--- a/scripts/implementation_coverage.py
+++ b/scripts/implementation_coverage.py
@@ -21,6 +21,7 @@ def get_moto_implementation(service_name):
 
 def calculate_implementation_coverage():
     service_names = Session().get_available_services()
+    service_names = sorted(service_names)
     coverage = {}
     for service_name in service_names:
         moto_client = get_moto_implementation(service_name)