diff --git a/src/device/input/parse/v01/server.go b/src/device/input/parse/v01/server.go
index 5482e4b..f54519a 100644
--- a/src/device/input/parse/v01/server.go
+++ b/src/device/input/parse/v01/server.go
@@ -274,6 +274,7 @@ func (v01 *V01) serveGMVote(w http.ResponseWriter, r *http.Request) {
 		v, ok := v01.cfg.Users[voter]
 		if _, ok2 := v01.cfg.Users[candidate]; !ok || !ok2 {
 			http.Error(w, "bad voter/candidate", http.StatusBadRequest)
+			return
 		}
 		v.Message = strings.Split(v.Message, "//")[0] + "//" + candidate
 		v01.cfg.Users[voter] = v
diff --git a/src/device/input/parse/v01/server_test.go b/src/device/input/parse/v01/server_test.go
index 9efbc46..41ad150 100644
--- a/src/device/input/parse/v01/server_test.go
+++ b/src/device/input/parse/v01/server_test.go
@@ -241,8 +241,25 @@ func TestServeGM(t *testing.T) {
 	t.Run("vote", func(t *testing.T) {
 		type result map[string]string
 
+		t.Run("cast bad vote", func(t *testing.T) {
+			v01 := NewV01(ctx, nil)
+			v01.cfg.Users = map[string]configUser{"bel": {}}
+			resp := do(v01, "/gm/rpc/vote?user=bel&payload=?", "")
+			if resp.Code != http.StatusBadRequest {
+				t.Error(resp)
+			}
+			if v01.cfg.Users["bel"].Message != "" {
+				t.Error(v01.cfg.Users["bel"].Message)
+			}
+		})
+
 		t.Run("cast vote", func(t *testing.T) {
-			t.Error("not impl")
+			v01 := NewV01(ctx, nil)
+			v01.cfg.Users = map[string]configUser{"bel": {}, "zach": {}}
+			do(v01, "/gm/rpc/vote?user=bel&payload=zach", "")
+			if v01.cfg.Users["bel"].Message != "//zach" {
+				t.Error(v01.cfg.Users["bel"].Message)
+			}
 		})
 
 		t.Run("get non vote", func(t *testing.T) {