diff --git a/typescript/sdk/src/aws/validator.ts b/typescript/sdk/src/aws/validator.ts
index 1a12b8eec5..dc28c1217c 100644
--- a/typescript/sdk/src/aws/validator.ts
+++ b/typescript/sdk/src/aws/validator.ts
@@ -90,8 +90,11 @@ export class S3Validator extends BaseValidator {
   async findCheckpoint(messageId: string, limit = 50) {
     const latestCheckpointIndex = await this.getLatestCheckpointIndex();
     // TODO: parallelize?
-    for (let i = 0; i <= limit; i--) {
-      const index = latestCheckpointIndex - i;
+    for (
+      let index = latestCheckpointIndex;
+      index >= latestCheckpointIndex - limit;
+      index--
+    ) {
       const s3checkpoint = await this.getCheckpoint(index);
       if (s3checkpoint?.value.message_id === messageId) {
         return s3checkpoint;
diff --git a/typescript/sdk/src/core/HyperlaneCore.ts b/typescript/sdk/src/core/HyperlaneCore.ts
index 7e10e6f837..a5739880fd 100644
--- a/typescript/sdk/src/core/HyperlaneCore.ts
+++ b/typescript/sdk/src/core/HyperlaneCore.ts
@@ -162,8 +162,7 @@ export class HyperlaneCore extends HyperlaneApp<CoreFactories> {
   }
 
   async relay(filters: ChainMap<Parameters<Mailbox['filters']['Dispatch']>>) {
-    for (const chain in filters) {
-      const filter = filters[chain];
+    for (const [chain, filter] of Object.entries(filters)) {
       const mailbox = this.getContracts(chain).mailbox;
       mailbox.on<DispatchEvent>(
         mailbox.filters.Dispatch(...filter),
diff --git a/typescript/sdk/src/ism/metadata/builder.ts b/typescript/sdk/src/ism/metadata/builder.ts
index 5da29a5ddf..31fd4e08a4 100644
--- a/typescript/sdk/src/ism/metadata/builder.ts
+++ b/typescript/sdk/src/ism/metadata/builder.ts
@@ -43,6 +43,7 @@ export class BaseMetadataBuilder
       }
     }
 
+    /* eslint-disable no-case-declarations */
     switch (ismConfig.type) {
       case IsmType.TRUSTED_RELAYER:
       case IsmType.PAUSABLE:
@@ -69,5 +70,6 @@ export class BaseMetadataBuilder
       default:
         throw new Error(`Unknown ISM config: ${ismConfig}`);
     }
+    /* eslint-enable no-case-declarations */
   }
 }
diff --git a/typescript/sdk/src/ism/metadata/multisig.ts b/typescript/sdk/src/ism/metadata/multisig.ts
index 1790e425af..6b189edf7e 100644
--- a/typescript/sdk/src/ism/metadata/multisig.ts
+++ b/typescript/sdk/src/ism/metadata/multisig.ts
@@ -136,7 +136,7 @@ export class MultisigMetadataBuilder
       index: parseInt(metadata.slice(64, 68)),
     };
 
-    let signatures: SignatureLike[] = [];
+    const signatures: SignatureLike[] = [];
     for (let i = 0; this.hasSignature(metadata, i); i++) {
       signatures.push(this.signatureAt(metadata, i));
     }