diff --git a/internal/aghnet/net_internal_test.go b/internal/aghnet/net_internal_test.go
index 6b5dc392..aed7532b 100644
--- a/internal/aghnet/net_internal_test.go
+++ b/internal/aghnet/net_internal_test.go
@@ -30,7 +30,7 @@ func substRootDirFS(t testing.TB, fsys fs.FS) {
 // RunCmdFunc is the signature of aghos.RunCommand function.
 type RunCmdFunc func(cmd string, args ...string) (code int, out []byte, err error)
 
-// substShell replaces the the aghos.RunCommand function used throughout the
+// substShell replaces the aghos.RunCommand function used throughout the
 // package with rc for tests ran under t.
 func substShell(t testing.TB, rc RunCmdFunc) {
 	t.Helper()
diff --git a/internal/arpdb/arpdb_internal_test.go b/internal/arpdb/arpdb_internal_test.go
index dfd57614..e3ed9486 100644
--- a/internal/arpdb/arpdb_internal_test.go
+++ b/internal/arpdb/arpdb_internal_test.go
@@ -22,7 +22,7 @@ var testdata fs.FS = os.DirFS("./testdata")
 // RunCmdFunc is the signature of aghos.RunCommand function.
 type RunCmdFunc func(cmd string, args ...string) (code int, out []byte, err error)
 
-// substShell replaces the the aghos.RunCommand function used throughout the
+// substShell replaces the aghos.RunCommand function used throughout the
 // package with rc for tests ran under t.
 func substShell(t testing.TB, rc RunCmdFunc) {
 	t.Helper()