diff --git a/acceptance/config_test.go b/acceptance/config_test.go
index d6713998e..0cf9280c1 100644
--- a/acceptance/config_test.go
+++ b/acceptance/config_test.go
@@ -31,7 +31,15 @@ type TestConfig struct {
 	// Old is a regexp, New is a replacement expression.
 	Repls []testdiff.Replacement
 
-	// List of server stubs to load.
+	// List of server stubs to load. Example configuration:
+	//
+	// [[Server]]
+	// Pattern = "POST /api/2.1/jobs/create"
+	// Response.Body = '''
+	// {
+	// 	"job_id": 1111
+	// }
+	// '''
 	Server []testserver.Stub
 }
 
diff --git a/internal/testutil/file.go b/internal/testutil/file.go
index 7c0f2d058..476c4123a 100644
--- a/internal/testutil/file.go
+++ b/internal/testutil/file.go
@@ -62,18 +62,6 @@ func StatFile(t TestingT, path string) os.FileInfo {
 	return fi
 }
 
-func DetectFile(t TestingT, path string) bool {
-	_, err := os.Stat(path)
-	if err == nil {
-		return true
-	}
-	if os.IsNotExist(err) {
-		return false
-	}
-	require.NoError(t, err)
-	return false
-}
-
 // AssertFileContents asserts that the file at path has the expected content.
 func AssertFileContents(t TestingT, path, expected string) bool {
 	actual := ReadFile(t, path)