diff --git a/src/cmd/compile/internal/types2/stdlib_test.go b/src/cmd/compile/internal/types2/stdlib_test.go
index 7d6753e5c2..cde35c17b6 100644
--- a/src/cmd/compile/internal/types2/stdlib_test.go
+++ b/src/cmd/compile/internal/types2/stdlib_test.go
@@ -204,6 +204,9 @@ func TestStdKen(t *testing.T) {
 // Package paths of excluded packages.
 var excluded = map[string]bool{
 	"builtin": true,
+
+	// See #46027: some imports are missing for this submodule.
+	"crypto/ed25519/internal/edwards25519/field/_asm": true,
 }
 
 // typecheck typechecks the given package files.
@@ -301,13 +304,6 @@ func (w *walker) walk(dir string) {
 		return
 	}
 
-	// skip submodules, which might not be vendored
-	for _, f := range files {
-		if f.Name() == "go.mod" {
-			return
-		}
-	}
-
 	// apply pkgh to the files in directory dir
 	// but ignore files directly under $GOROOT/src (might be temporary test files).
 	if dir != filepath.Join(runtime.GOROOT(), "src") {
diff --git a/src/go/types/stdlib_test.go b/src/go/types/stdlib_test.go
index b565956e08..3dea8dcf1e 100644
--- a/src/go/types/stdlib_test.go
+++ b/src/go/types/stdlib_test.go
@@ -200,6 +200,9 @@ func TestStdKen(t *testing.T) {
 // Package paths of excluded packages.
 var excluded = map[string]bool{
 	"builtin": true,
+
+	// See #46027: some imports are missing for this submodule.
+	"crypto/ed25519/internal/edwards25519/field/_asm": true,
 }
 
 // typecheck typechecks the given package files.
@@ -306,13 +309,6 @@ func (w *walker) walk(dir string) {
 		return
 	}
 
-	// skip submodules, which might not be vendored
-	for _, f := range files {
-		if f.Name() == "go.mod" {
-			return
-		}
-	}
-
 	// apply pkgh to the files in directory dir
 	// but ignore files directly under $GOROOT/src (might be temporary test files).
 	if dir != filepath.Join(runtime.GOROOT(), "src") {