diff --git a/request-blocklist/config-reference.json b/request-blocklist/config-reference.json
index 65d8264..b8030da 100644
--- a/request-blocklist/config-reference.json
+++ b/request-blocklist/config-reference.json
@@ -50,6 +50,10 @@
                 "rule": "request-blocklist.example/missing-prop",
                 "reason": "Example rule incorrectly missing domains property"
               },
+              {
+                "rule": "request-blocklist.example/missing-reason",
+                "domains": ["<all>"]
+              },
               {
                 "rule": "request-blocklist.example/extra-prop",
                 "domains": ["<all>"],
diff --git a/request-blocklist/tests.json b/request-blocklist/tests.json
index 93f1f0e..f11e9ca 100644
--- a/request-blocklist/tests.json
+++ b/request-blocklist/tests.json
@@ -293,6 +293,14 @@
         "expectAction": "allow",
         "exceptPlatforms": []
       },
+      {
+        "name": "correct rule that only misses reason property",
+        "requestUrl": "https://request-blocklist.example/missing-reason",
+        "requestType": "image",
+        "websiteUrl": "https://website.example",
+        "expectAction": "block",
+        "exceptPlatforms": []
+      },
       {
         "name": "incorrect rule that has extra property",
         "requestUrl": "https://request-blocklist.example/extra-prop",