diff --git a/dev/conformance/runner.ts b/dev/conformance/runner.ts
index 3ade3a1f5..f333fd933 100644
--- a/dev/conformance/runner.ts
+++ b/dev/conformance/runner.ts
@@ -524,13 +524,13 @@ function runTest(spec: ConformanceProto) {
  * as strings to a proper protobuf type since protobufJS does not support it at
  * the moment.
  */
-function normalizeTimestamp(obj: {[key: string]: {}}) {
+function normalizeTimestamp(obj: Record<string, unknown>) {
   const fieldNames = ['updateTime', 'createTime', 'readTime'];
   for (const key of Object.keys(obj)) {
     if (fieldNames.includes(key) && typeof obj[key] === 'string') {
       obj[key] = convertTimestamp(obj[key] as string);
     } else if (typeof obj[key] === 'object') {
-      normalizeTimestamp(obj[key]);
+      normalizeTimestamp(obj[key] as Record<string, unknown>);
     }
   }
 }
@@ -563,7 +563,7 @@ function convertTimestamp(text: string): {[key: string]: number} {
  * Value type, but the 'limit' field in 'query' has Int32Value type, resulting
  * in the need for an extra layer of specificity.
  */
-function normalizeInt32Value(obj: {[key: string]: {}}, parent = '') {
+function normalizeInt32Value(obj: Record<string, unknown>, parent = '') {
   const fieldNames = ['limit'];
   const parentNames = ['query'];
   for (const key of Object.keys(obj)) {
@@ -576,7 +576,7 @@ function normalizeInt32Value(obj: {[key: string]: {}}, parent = '') {
         value: obj[key],
       };
     } else if (typeof obj[key] === 'object') {
-      normalizeInt32Value(obj[key], key);
+      normalizeInt32Value(obj[key] as Record<string, object>, key);
     }
   }
 }
diff --git a/dev/src/reference/collection-reference.ts b/dev/src/reference/collection-reference.ts
index 9a50a1709..f3fb919c9 100644
--- a/dev/src/reference/collection-reference.ts
+++ b/dev/src/reference/collection-reference.ts
@@ -183,11 +183,10 @@ export class CollectionReference<
       };
 
       return this.firestore
-        .request<api.IListDocumentsRequest, api.IDocument[]>(
-          'listDocuments',
-          request,
-          tag
-        )
+        .request<
+          api.IListDocumentsRequest,
+          api.IDocument[]
+        >('listDocuments', request, tag)
         .then(documents => {
           // Note that the backend already orders these documents by name,
           // so we do not need to manually sort them.
diff --git a/dev/src/reference/document-reference.ts b/dev/src/reference/document-reference.ts
index 48c2799aa..0af5e549e 100644
--- a/dev/src/reference/document-reference.ts
+++ b/dev/src/reference/document-reference.ts
@@ -257,11 +257,10 @@ export class DocumentReference<
         pageSize: Math.pow(2, 16) - 1,
       };
       return this._firestore
-        .request<api.IListCollectionIdsRequest, string[]>(
-          'listCollectionIds',
-          request,
-          tag
-        )
+        .request<
+          api.IListCollectionIdsRequest,
+          string[]
+        >('listCollectionIds', request, tag)
         .then(collectionIds => {
           const collections: Array<CollectionReference> = [];
 
diff --git a/dev/test/gapic_firestore_admin_v1.ts b/dev/test/gapic_firestore_admin_v1.ts
index 6d577b987..c3b5f21b1 100644
--- a/dev/test/gapic_firestore_admin_v1.ts
+++ b/dev/test/gapic_firestore_admin_v1.ts
@@ -3745,9 +3745,9 @@ describe('v1.FirestoreAdminClient', () => {
       assert(
         (client.descriptors.page.listIndexes.createStream as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -3796,9 +3796,9 @@ describe('v1.FirestoreAdminClient', () => {
       assert(
         (client.descriptors.page.listIndexes.createStream as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -3839,9 +3839,9 @@ describe('v1.FirestoreAdminClient', () => {
       assert(
         (client.descriptors.page.listIndexes.asyncIterate as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -3881,9 +3881,9 @@ describe('v1.FirestoreAdminClient', () => {
       assert(
         (client.descriptors.page.listIndexes.asyncIterate as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
   });
@@ -4050,9 +4050,9 @@ describe('v1.FirestoreAdminClient', () => {
       assert(
         (client.descriptors.page.listFields.createStream as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -4101,9 +4101,9 @@ describe('v1.FirestoreAdminClient', () => {
       assert(
         (client.descriptors.page.listFields.createStream as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -4144,9 +4144,9 @@ describe('v1.FirestoreAdminClient', () => {
       assert(
         (client.descriptors.page.listFields.asyncIterate as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -4186,9 +4186,9 @@ describe('v1.FirestoreAdminClient', () => {
       assert(
         (client.descriptors.page.listFields.asyncIterate as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
   });
diff --git a/dev/test/gapic_firestore_v1.ts b/dev/test/gapic_firestore_v1.ts
index df6a2f4dc..006f11f32 100644
--- a/dev/test/gapic_firestore_v1.ts
+++ b/dev/test/gapic_firestore_v1.ts
@@ -2254,9 +2254,9 @@ describe('v1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.listDocuments.createStream as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -2305,9 +2305,9 @@ describe('v1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.listDocuments.createStream as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -2353,9 +2353,9 @@ describe('v1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.listDocuments.asyncIterate as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -2398,9 +2398,9 @@ describe('v1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.listDocuments.asyncIterate as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
   });
@@ -2564,9 +2564,9 @@ describe('v1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.partitionQuery.createStream as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -2610,9 +2610,9 @@ describe('v1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.partitionQuery.createStream as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -2653,9 +2653,9 @@ describe('v1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.partitionQuery.asyncIterate as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -2693,9 +2693,9 @@ describe('v1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.partitionQuery.asyncIterate as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
   });
@@ -2844,9 +2844,9 @@ describe('v1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.listCollectionIds.createStream as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -2890,9 +2890,9 @@ describe('v1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.listCollectionIds.createStream as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -2929,9 +2929,9 @@ describe('v1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.listCollectionIds.asyncIterate as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -2969,9 +2969,9 @@ describe('v1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.listCollectionIds.asyncIterate as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
   });
diff --git a/dev/test/gapic_firestore_v1beta1.ts b/dev/test/gapic_firestore_v1beta1.ts
index e6431944f..5e168c725 100644
--- a/dev/test/gapic_firestore_v1beta1.ts
+++ b/dev/test/gapic_firestore_v1beta1.ts
@@ -2088,9 +2088,9 @@ describe('v1beta1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.listDocuments.createStream as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -2142,9 +2142,9 @@ describe('v1beta1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.listDocuments.createStream as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -2190,9 +2190,9 @@ describe('v1beta1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.listDocuments.asyncIterate as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -2235,9 +2235,9 @@ describe('v1beta1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.listDocuments.asyncIterate as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
   });
@@ -2404,9 +2404,9 @@ describe('v1beta1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.partitionQuery.createStream as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -2453,9 +2453,9 @@ describe('v1beta1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.partitionQuery.createStream as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -2496,9 +2496,9 @@ describe('v1beta1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.partitionQuery.asyncIterate as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -2536,9 +2536,9 @@ describe('v1beta1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.partitionQuery.asyncIterate as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
   });
@@ -2687,9 +2687,9 @@ describe('v1beta1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.listCollectionIds.createStream as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -2733,9 +2733,9 @@ describe('v1beta1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.listCollectionIds.createStream as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -2772,9 +2772,9 @@ describe('v1beta1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.listCollectionIds.asyncIterate as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
 
@@ -2812,9 +2812,9 @@ describe('v1beta1.FirestoreClient', () => {
       assert(
         (client.descriptors.page.listCollectionIds.asyncIterate as SinonStub)
           .getCall(0)
-          .args[2].otherArgs.headers['x-goog-request-params'].includes(
-            expectedHeaderRequestParams
-          )
+          .args[2].otherArgs.headers[
+            'x-goog-request-params'
+          ].includes(expectedHeaderRequestParams)
       );
     });
   });
diff --git a/package.json b/package.json
index 9ed6b98f4..1a37b9c2a 100644
--- a/package.json
+++ b/package.json
@@ -84,7 +84,9 @@
     "chai-as-promised": "^7.1.1",
     "codecov": "^3.6.1",
     "duplexify": "^4.0.0",
+    "execa": "^5.1.1",
     "extend": "^3.0.2",
+    "fs-extra": "7.0.1",
     "gapic-tools": "^0.4.0",
     "gts": "^5.0.1",
     "jsdoc": "^4.0.0",
@@ -92,6 +94,7 @@
     "jsdoc-region-tag": "^3.0.0",
     "length-prefixed-json-stream": "^1.0.1",
     "linkinator": "^3.0.0",
+    "mkdirp": "^1.0.4",
     "mocha": "^9.2.2",
     "protobufjs-cli": "^1.1.2",
     "proxyquire": "^2.1.3",