diff --git a/.gitignore b/.gitignore
index a63a7fa95..0f1860025 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 .cache
+.idea
 .nyc_output
 .vscode
 coverage
diff --git a/types/index.d.ts b/types/index.d.ts
index 9a81a905a..b0c26bd17 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -52,7 +52,7 @@ declare namespace nock {
     | RegExp
     | DataMatcherArray
     | DataMatcherMap
-  interface DataMatcherArray extends Array<DataMatcher> {}
+  interface DataMatcherArray extends ReadonlyArray<DataMatcher> {}
   interface DataMatcherMap {
     [key: string]: DataMatcher
   }
diff --git a/types/tests.ts b/types/tests.ts
index cfc870137..f241e0982 100644
--- a/types/tests.ts
+++ b/types/tests.ts
@@ -40,7 +40,7 @@ inst = scope.post(str, objWithUndefinedValue)
 inst = scope.post(str, str)
 inst = scope.post(str, strings)
 inst = scope.post(str, [num, str, regex])
-inst = scope.post(str, [num, num, num])
+inst = scope.post(str, [num, num, num] as const)
 inst = scope.post(str, regex)
 inst = scope.post(str, buffer)
 inst = scope.post(str, true) // $ExpectError