diff --git a/tests/phase21/endpoint-handler-contract.test.cjs b/tests/phase21/endpoint-handler-contract.test.cjs
index 575556a4..671f6470 100644
--- a/tests/phase21/endpoint-handler-contract.test.cjs
+++ b/tests/phase21/endpoint-handler-contract.test.cjs
@@ -1215,7 +1215,7 @@ test("getadvancedsearchpaged returns SEARCH_STRING_REQUIRED when searchstring mi
         respondSuccess: respondSuccessMock,
         relayGet: async () => ({}),
         azureHeadersPagedCustom: () => ({}),
-        _: { has: () => false }
+        hasOwn: (obj, key) => Object.prototype.hasOwnProperty.call(obj, key)
     });
 
     const req = {
@@ -1238,7 +1238,7 @@ test("getadvancedsearchpaged returns ORDER_BY_REQUIRED when orderby missing", as
         respondSuccess: respondSuccessMock,
         relayGet: async () => ({}),
         azureHeadersPagedCustom: () => ({}),
-        _: { has: () => false }
+        hasOwn: (obj, key) => Object.prototype.hasOwnProperty.call(obj, key)
     });
 
     const req = {
@@ -1262,7 +1262,7 @@ test("getadvancedsearchpaged catch path returns ADVANCED_SEARCH_PAGED_FETCH_FAIL
         relayGet: async ({ res, errorResponse }) =>
             respondErrorMock(res, errorResponse),
         azureHeadersPagedCustom: () => ({}),
-        _: { has: () => false }
+        hasOwn: (obj, key) => Object.prototype.hasOwnProperty.call(obj, key)
     });
 
     const req = {
@@ -4416,10 +4416,20 @@ test("getToken catch path returns TOKEN_FETCH_FAILED", async () => {
 
 test("getsipsmedia returns success contract", async () => {
     const mod = loadModule("pages/api/endpoint/getsipsmedia_api.js", {
-        respondSuccess: respondSuccessMock
+        respondError: respondErrorMock,
+        relayGet: async ({ res }) =>
+            respondSuccessMock(res, {
+                "@odata.count": 4,
+                value: []
+            })
     });
 
-    const req = { query: {} };
+    const req = {
+        method: "GET",
+        query: {
+            caseid: "11111111-1111-4111-8111-111111111111"
+        }
+    };
     const res = createRes();
     await mod.default(req, res);
 
@@ -4459,13 +4469,25 @@ test("getappealtypesfornewappeal returns METHOD_NOT_ALLOWED for non-GET methods"
 });
 
 const run = async () => {
+    const filter = process.env.PEDW_TEST_FILTER;
+
+    const selectedTests = filter
+        ? tests.filter((currentTest) => currentTest.name.includes(filter))
+        : tests;
+
+    if (selectedTests.length === 0) {
+        throw new Error(`No tests match filter: ${filter}`);
+    }
+
     let passed = 0;
-    for (const currentTest of tests) {
+
+    for (const currentTest of selectedTests) {
         await currentTest.fn();
         passed += 1;
     }
+
     console.log(
-        `Phase 21 endpoint-handler contract tests passed (${passed}/${tests.length}).`
+        `Phase 21 endpoint-handler contract tests passed (${passed}/${selectedTests.length}).`
     );
 };