diff --git a/tests/draft-next/optional/format/relative-json-pointer.json b/tests/draft-next/optional/format/relative-json-pointer.json
index 0eebe03a..8533292d 100644
--- a/tests/draft-next/optional/format/relative-json-pointer.json
+++ b/tests/draft-next/optional/format/relative-json-pointer.json
@@ -80,6 +80,11 @@
                 "description": "zero cannot be followed by other digits, plus octothorpe",
                 "data": "01#",
                 "valid": false
+            },
+            {
+                "description": "empty string",
+                "data": "",
+                "valid": false
             }
         ]
     }
diff --git a/tests/draft2019-09/optional/format/relative-json-pointer.json b/tests/draft2019-09/optional/format/relative-json-pointer.json
index 93735366..6206907e 100644
--- a/tests/draft2019-09/optional/format/relative-json-pointer.json
+++ b/tests/draft2019-09/optional/format/relative-json-pointer.json
@@ -80,6 +80,11 @@
                 "description": "zero cannot be followed by other digits, plus octothorpe",
                 "data": "01#",
                 "valid": false
+            },
+            {
+                "description": "empty string",
+                "data": "",
+                "valid": false
             }
         ]
     }
diff --git a/tests/draft2020-12/optional/format/relative-json-pointer.json b/tests/draft2020-12/optional/format/relative-json-pointer.json
index 3454b631..477171f7 100644
--- a/tests/draft2020-12/optional/format/relative-json-pointer.json
+++ b/tests/draft2020-12/optional/format/relative-json-pointer.json
@@ -80,6 +80,11 @@
                 "description": "zero cannot be followed by other digits, plus octothorpe",
                 "data": "01#",
                 "valid": false
+            },
+            {
+                "description": "empty string",
+                "data": "",
+                "valid": false
             }
         ]
     }
diff --git a/tests/draft7/optional/format/relative-json-pointer.json b/tests/draft7/optional/format/relative-json-pointer.json
index 9309986f..37102b75 100644
--- a/tests/draft7/optional/format/relative-json-pointer.json
+++ b/tests/draft7/optional/format/relative-json-pointer.json
@@ -77,6 +77,11 @@
                 "description": "zero cannot be followed by other digits, plus octothorpe",
                 "data": "01#",
                 "valid": false
+            },
+            {
+                "description": "empty string",
+                "data": "",
+                "valid": false
             }
         ]
     }