diff --git a/packages/test/src/integration-tests-old.ts b/packages/test/src/integration-tests-old.ts
index b0fdb3a49..755e91fcd 100644
--- a/packages/test/src/integration-tests-old.ts
+++ b/packages/test/src/integration-tests-old.ts
@@ -1,4 +1,10 @@
 /* eslint @typescript-eslint/no-non-null-assertion: 0 */
+
+/**
+ * Our most recent style of integration tests are those in the
+ * integration-tests/ directory. This file has been given the suffix -old to
+ * distinguish the different variants.
+ */
 import path from 'node:path';
 import v8 from 'node:v8';
 import { readFileSync } from 'node:fs';
diff --git a/packages/test/src/test-integration-codec-old.ts b/packages/test/src/test-integration-codec-old.ts
index f4ccf8d1f..651887347 100644
--- a/packages/test/src/test-integration-codec-old.ts
+++ b/packages/test/src/test-integration-codec-old.ts
@@ -1,3 +1,9 @@
+/**
+ * Our most recent style of integration tests are those in the
+ * integration-tests/ directory. This file has been given the suffix -old to
+ * distinguish the different variants.
+ */
+
 import { RUN_INTEGRATION_TESTS, ByteSkewerPayloadCodec } from './helpers';
 import { runIntegrationTests } from './integration-tests-old';
 
diff --git a/packages/test/src/test-integration-old.ts b/packages/test/src/test-integration-old.ts
index 6cdf1beb7..b4e66d493 100644
--- a/packages/test/src/test-integration-old.ts
+++ b/packages/test/src/test-integration-old.ts
@@ -1,3 +1,9 @@
+/**
+ * Our most recent style of integration tests are those in the
+ * integration-tests/ directory. This file has been given the suffix -old to
+ * distinguish the different variants.
+ */
+
 import { RUN_INTEGRATION_TESTS } from './helpers';
 import { runIntegrationTests } from './integration-tests-old';