diff --git a/fixtures/file b/fixtures/file
index 9824d5b..99df774 100644
--- a/fixtures/file
+++ b/fixtures/file
@@ -101,3 +101,5 @@ https://hooks.slack.com/services/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
 
 doi:10.1392/BC1.0
 10.1000/123
+
+a80122b2565c3e26a61cbf58d1d1aad7-us5
diff --git a/pywhat/Data/regex.json b/pywhat/Data/regex.json
index 0318227..25a67b0 100644
--- a/pywhat/Data/regex.json
+++ b/pywhat/Data/regex.json
@@ -1330,7 +1330,7 @@
       "Regex": "(?i)^([0-9a-f]{32}-us[0-9]{1,2})$",
       "plural_name": false,
       "Description": null,
-      "Exploit": "Use the command below to verify that the API key is valid:\n  $ curl --request GET --url 'https://<dc>.api.mailchimp.com/3.0/' --user 'anystring:API_KEY_HERE' --include\n",
+      "Exploit": "Use the command below to verify that the API key is valid (substitute <dc> for your datacenter, i. e. us5):\n  $ curl --request GET --url 'https://<dc>.api.mailchimp.com/3.0/' --user 'anystring:API_KEY_HERE' --include\n",
       "Rarity": 0.8,
       "URL": null,
       "Tags": [
@@ -1338,7 +1338,15 @@
          "API Keys",
          "Credentials",
          "Mailchimp"
-      ]
+      ],
+      "Examples": {
+         "Valid": [
+            "d619ce3b691e29ec064fede7ff9afbff-us5",
+            "4bf6010e49fb0791f3940681791934e7-us5",
+            "a80122b2565c3e26a61cbf58d1d1aad7-us5"
+         ],
+         "Invalid": []
+      }
    },
    {
       "Name": "Notion Integration Token",
diff --git a/tests/test_click.py b/tests/test_click.py
index 15779ba..cdaf5ec 100644
--- a/tests/test_click.py
+++ b/tests/test_click.py
@@ -357,6 +357,13 @@ def test_file_fixture_doi():
     assert re.findall("DOI", str(result.output))
 
 
+def test_file_fixture_mailchimp():
+    runner = CliRunner()
+    result = runner.invoke(main, ["-db", "fixtures/file"])
+    assert result.exit_code == 0
+    assert re.findall("Mailchimp", str(result.output))
+
+
 def test_file_cors():
     runner = CliRunner()
     result = runner.invoke(main, ["-db", "Access-Control-Allow: *"])