diff --git a/itests/specs/eth_openrpc.json b/itests/specs/eth_openrpc.json
index 1947bbd32..0f354b5c7 100644
--- a/itests/specs/eth_openrpc.json
+++ b/itests/specs/eth_openrpc.json
@@ -1794,9 +1794,9 @@
 			"result": {
 				"name": "Filter Identifier",
 				"schema": {
-					"title": "hex encoded unsigned integer",
+					"title": "32 byte hex value",
 					"type": "string",
-					"pattern": "^0x([1-9a-f]+[0-9a-f]*|0)$"
+					"pattern": "^0x[0-9a-f]{64}$"
 				}
 			}
 		},
@@ -1807,9 +1807,9 @@
 			"result": {
 				"name": "Filter Identifier",
 				"schema": {
-					"title": "hex encoded unsigned integer",
+					"title": "32 byte hex value",
 					"type": "string",
-					"pattern": "^0x([1-9a-f]+[0-9a-f]*|0)$"
+					"pattern": "^0x[0-9a-f]{64}$"
 				}
 			}
 		},
@@ -1820,9 +1820,9 @@
 			"result": {
 				"name": "Filter Identifier",
 				"schema": {
-					"title": "hex encoded unsigned integer",
+					"title": "32 byte hex value",
 					"type": "string",
-					"pattern": "^0x([1-9a-f]+[0-9a-f]*|0)$"
+					"pattern": "^0x[0-9a-f]{64}$"
 				}
 			}
 		},
@@ -1833,9 +1833,9 @@
 				{
 					"name": "Filter Identifier",
 					"schema": {
-						"title": "hex encoded unsigned integer",
+						"title": "32 byte hex value",
 						"type": "string",
-						"pattern": "^0x([1-9a-f]+[0-9a-f]*|0)$"
+						"pattern": "^0x[0-9a-f]{64}$"
 					}
 				}
 			],
@@ -1853,9 +1853,9 @@
 				{
 					"name": "Filter Identifier",
 					"schema": {
-						"title": "hex encoded unsigned integer",
+						"title": "32 byte hex value",
 						"type": "string",
-						"pattern": "^0x([1-9a-f]+[0-9a-f]*|0)$"
+						"pattern": "^0x[0-9a-f]{64}$"
 					}
 				}
 			],
@@ -1954,9 +1954,9 @@
 				{
 					"name": "Filter Identifier",
 					"schema": {
-						"title": "hex encoded unsigned integer",
+						"title": "32 byte hex value",
 						"type": "string",
-						"pattern": "^0x([1-9a-f]+[0-9a-f]*|0)$"
+						"pattern": "^0x[0-9a-f]{64}$"
 					}
 				}
 			],