diff --git a/.github/workflows/test_llgo.sh b/.github/workflows/test_llgo.sh
index e1838fa5..0ecff3a1 100644
--- a/.github/workflows/test_llgo.sh
+++ b/.github/workflows/test_llgo.sh
@@ -4,7 +4,7 @@ set -e
 export LLGOROOT=$PWD
 
 testcmd=/tmp/test
-llgo build -o $testcmd ./_test
+llgo build -o $testcmd ./c/bdwgc/_test
 cases=$($testcmd)
 total=$(echo "$cases" | wc -l | tr -d ' ')
 failed=0
diff --git a/_test/bdwgc.go b/c/bdwgc/_test/bdwgc.go
similarity index 97%
rename from _test/bdwgc.go
rename to c/bdwgc/_test/bdwgc.go
index 17d2759f..f4d900d4 100644
--- a/_test/bdwgc.go
+++ b/c/bdwgc/_test/bdwgc.go
@@ -3,9 +3,9 @@ package main
 import (
 	"unsafe"
 
-	"github.com/goplus/llgo/_test/testing"
 	"github.com/goplus/llgo/c"
 	"github.com/goplus/llgo/c/bdwgc"
+	"github.com/goplus/llgo/c/bdwgc/_test/testing"
 )
 
 // ------ Test malloc ------
diff --git a/_test/main.go b/c/bdwgc/_test/main.go
similarity index 92%
rename from _test/main.go
rename to c/bdwgc/_test/main.go
index 59869456..1be2b40e 100644
--- a/_test/main.go
+++ b/c/bdwgc/_test/main.go
@@ -1,8 +1,8 @@
 package main
 
 import (
-	"github.com/goplus/llgo/_test/testing"
 	"github.com/goplus/llgo/c"
+	"github.com/goplus/llgo/c/bdwgc/_test/testing"
 )
 
 type TestCase struct {
diff --git a/_test/testing/testing.go b/c/bdwgc/_test/testing/testing.go
similarity index 100%
rename from _test/testing/testing.go
rename to c/bdwgc/_test/testing/testing.go