diff --git a/typescript/.changeset/pink-mirrors-sneeze.md b/typescript/.changeset/pink-mirrors-sneeze.md
new file mode 100644
index 000000000..207dab4e5
--- /dev/null
+++ b/typescript/.changeset/pink-mirrors-sneeze.md
@@ -0,0 +1,5 @@
+---
+'@hyperlane-xyz/sdk': major
+---
+
+Refactor testIgpConfig function for clarity and maintainability
diff --git a/typescript/sdk/src/test/testUtils.ts b/typescript/sdk/src/test/testUtils.ts
index fc498469a..5613d6be6 100644
--- a/typescript/sdk/src/test/testUtils.ts
+++ b/typescript/sdk/src/test/testUtils.ts
@@ -63,25 +63,30 @@ const TEST_ORACLE_CONFIG = {
   tokenExchangeRate: ethers.utils.parseUnits('1', 10),
 };
 
+const TEST_OVERHEAD_COST = 60000;
+
 export function testIgpConfig(
   chains: ChainName[],
   owner = nonZeroAddress,
 ): ChainMap<IgpConfig> {
   return Object.fromEntries(
-    chains.map((local) => [
-      local,
-      {
-        owner,
-        oracleKey: owner,
-        beneficiary: owner,
-        // TODO: these should be one map
-        overhead: Object.fromEntries(
-          exclude(local, chains).map((remote) => [remote, 60000]),
-        ),
-        oracleConfig: Object.fromEntries(
-          exclude(local, chains).map((remote) => [remote, TEST_ORACLE_CONFIG]),
-        ),
-      },
-    ]),
+    chains.map((local) => {
+      const overhead: IgpConfig['overhead'] = {};
+      const oracleConfig: IgpConfig['oracleConfig'] = {};
+      exclude(local, chains).map((remote: ChainName) => {
+        overhead[remote] = TEST_OVERHEAD_COST;
+        oracleConfig[remote] = TEST_ORACLE_CONFIG;
+      });
+      return [
+        local,
+        {
+          owner,
+          oracleKey: owner,
+          beneficiary: owner,
+          overhead,
+          oracleConfig,
+        },
+      ];
+    }),
   );
 }