diff --git a/mcp/cmd_test.go b/mcp/cmd_test.go
index e4f33dd..79e89bf 100644
--- a/mcp/cmd_test.go
+++ b/mcp/cmd_test.go
@@ -13,6 +13,7 @@ import (
 
 	"github.com/google/go-cmp/cmp"
 	"github.com/modelcontextprotocol/go-sdk/mcp"
+	"golang.org/x/tools/internal/testenv"
 )
 
 const runAsServer = "_MCP_RUN_AS_SERVER"
@@ -38,6 +39,8 @@ func runServer() {
 }
 
 func TestCmdTransport(t *testing.T) {
+	testenv.NeedsExec(t)
+
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()