diff --git a/echotest/reader.go b/echotest/reader.go
index 0caceca02..db7af0498 100644
--- a/echotest/reader.go
+++ b/echotest/reader.go
@@ -15,7 +15,7 @@ type loadBytesOpts func([]byte) []byte
 // TrimNewlineEnd instructs LoadBytes to remove `\n` from the end of loaded file.
 func TrimNewlineEnd(bytes []byte) []byte {
 	bLen := len(bytes)
-	if bLen > 1 && bytes[bLen-1] == '\n' {
+	if bLen > 0 && bytes[bLen-1] == '\n' {
 		bytes = bytes[:bLen-1]
 	}
 	return bytes
diff --git a/echotest/reader_test.go b/echotest/reader_test.go
index 23b3c2dd2..e56681c0a 100644
--- a/echotest/reader_test.go
+++ b/echotest/reader_test.go
@@ -19,3 +19,7 @@ func TestLoadBytesOK_TrimNewlineEnd(t *testing.T) {
 	data := LoadBytes(t, "testdata/test.json", TrimNewlineEnd)
 	assert.Equal(t, []byte(testJSONContent), data)
 }
+
+func TestTrimNewlineEnd(t *testing.T) {
+	assert.Empty(t, TrimNewlineEnd([]byte("\n")))
+}