diff --git a/x-pack/test/cases_api_integration/common/lib/utils.ts b/x-pack/test/cases_api_integration/common/lib/utils.ts
index 10ccac3c12139..9c56db80e45fc 100644
--- a/x-pack/test/cases_api_integration/common/lib/utils.ts
+++ b/x-pack/test/cases_api_integration/common/lib/utils.ts
@@ -1143,16 +1143,3 @@ export const extractWarningValueFromWarningHeader = (warningHeader: string) => {
   const warningValue = warningHeader.substring(firstQuote + 1, lastQuote);
   return warningValue;
 };
-
-/**
- * Regular expression to test if a string matches the RFC7234 specification (without warn-date) for warning headers. This pattern assumes that the warn code
- * is always 299. Further, this pattern assumes that the warn agent represents a version of Kibana.
- *
- * Example: 299 Kibana-8.2.0 "Deprecated endpoint"
- */
-const WARNING_HEADER_REGEX = /299 Kibana-\d+.\d+.\d+ \".+\"/g;
-
-export const assertWarningHeader = (warningHeader: string) => {
-  const res = warningHeader.match(WARNING_HEADER_REGEX);
-  expect(res).not.to.be(null);
-};
diff --git a/x-pack/test/cases_api_integration/common/lib/validation.ts b/x-pack/test/cases_api_integration/common/lib/validation.ts
index 220074f22db86..d03c9494d6b99 100644
--- a/x-pack/test/cases_api_integration/common/lib/validation.ts
+++ b/x-pack/test/cases_api_integration/common/lib/validation.ts
@@ -37,3 +37,16 @@ export function arraysToEqual(array1?: object[], array2?: object[]) {
   const array1AsSet = new Set(array1);
   return array2.every((item) => array1AsSet.has(item));
 }
+
+/**
+ * Regular expression to test if a string matches the RFC7234 specification (without warn-date) for warning headers. This pattern assumes that the warn code
+ * is always 299. Further, this pattern assumes that the warn agent represents a version of Kibana.
+ *
+ * Example: 299 Kibana-8.2.0 "Deprecated endpoint"
+ */
+const WARNING_HEADER_REGEX = /299 Kibana-\d+.\d+.\d+ \".+\"/g;
+
+export const assertWarningHeader = (warningHeader: string) => {
+  const res = warningHeader.match(WARNING_HEADER_REGEX);
+  expect(res).not.to.be(null);
+};