diff --git a/tools/droplets/create.py b/tools/droplets/create.py
index 58a411d3d8..c9e0427ca4 100644
--- a/tools/droplets/create.py
+++ b/tools/droplets/create.py
@@ -288,19 +288,17 @@ Your remote Zulip dev server has been created!
 
 def print_production_droplet_instructions(droplet_domain_name: str) -> None:
     print(
-        """
+        f"""
 -----
 
 Production droplet created successfully!
 
 Connect to the server by running
 
-ssh root@{}
+ssh root@{droplet_domain_name}
 
 -----
-""".format(
-            droplet_domain_name
-        )
+"""
     )
 
 
diff --git a/zerver/webhooks/json/tests.py b/zerver/webhooks/json/tests.py
index 3f80f8d0b5..fd97dfd8e1 100644
--- a/zerver/webhooks/json/tests.py
+++ b/zerver/webhooks/json/tests.py
@@ -16,11 +16,9 @@ class JsonHookTests(WebhookTestCase):
             original_fixture = json.load(f)
 
         expected_topic = "JSON"
-        expected_message = """```json
-{original_fixture}
-```""".format(
-            original_fixture=json.dumps(original_fixture, indent=2)
-        )
+        expected_message = f"""```json
+{json.dumps(original_fixture, indent=2)}
+```"""
         self.check_webhook("json_github_push__1_commit", expected_topic, expected_message)
 
     def test_json_pingdom_http_up_to_down_message(self) -> None:
@@ -31,11 +29,9 @@ class JsonHookTests(WebhookTestCase):
             original_fixture = json.load(f)
 
         expected_topic = "JSON"
-        expected_message = """```json
-{original_fixture}
-```""".format(
-            original_fixture=json.dumps(original_fixture, indent=2)
-        )
+        expected_message = f"""```json
+{json.dumps(original_fixture, indent=2)}
+```"""
         self.check_webhook("json_pingdom_http_up_to_down", expected_topic, expected_message)
 
     def test_json_sentry_event_for_exception_js_message(self) -> None:
@@ -46,9 +42,7 @@ class JsonHookTests(WebhookTestCase):
             original_fixture = json.load(f)
 
         expected_topic = "JSON"
-        expected_message = """```json
-{original_fixture}
-```""".format(
-            original_fixture=json.dumps(original_fixture, indent=2)
-        )
+        expected_message = f"""```json
+{json.dumps(original_fixture, indent=2)}
+```"""
         self.check_webhook("json_sentry_event_for_exception_js", expected_topic, expected_message)