diff --git a/contrib/submit-queue/github/github.go b/contrib/submit-queue/github/github.go
index 89a723337b6..73e089d6795 100644
--- a/contrib/submit-queue/github/github.go
+++ b/contrib/submit-queue/github/github.go
@@ -96,7 +96,7 @@ func validateLGTMAfterPush(client *github.Client, user, project string, pr *gith
 	for ix := range events {
 		event := &events[ix]
 		if *event.Event == "labeled" && *event.Label.Name == "lgtm" {
-			*lgtmTime = *event.CreatedAt
+			lgtmTime = event.CreatedAt
 		}
 	}
 	if lgtmTime == nil {
diff --git a/contrib/submit-queue/github/github_test.go b/contrib/submit-queue/github/github_test.go
index 83449c9803a..382a4da9b45 100644
--- a/contrib/submit-queue/github/github_test.go
+++ b/contrib/submit-queue/github/github_test.go
@@ -24,11 +24,14 @@ import (
 	"net/url"
 	"strconv"
 	"testing"
+	"time"
 
 	"github.com/google/go-github/github"
 )
 
-func stringPtr(val string) *string { return &val }
+func stringPtr(val string) *string     { return &val }
+func timePtr(val time.Time) *time.Time { return &val }
+func intPtr(val int) *int              { return &val }
 
 func TestHasLabel(t *testing.T) {
 	tests := []struct {
@@ -388,3 +391,74 @@ func TestComputeStatus(t *testing.T) {
 		}
 	}
 }
+
+func TestValidateLGTMAfterPush(t *testing.T) {
+	tests := []struct {
+		issueEvents []github.IssueEvent
+		shouldPass  bool
+		pull        github.PullRequest
+	}{
+		{
+			issueEvents: []github.IssueEvent{
+				{
+					Event: stringPtr("labeled"),
+					Label: &github.Label{
+						Name: stringPtr("lgtm"),
+					},
+					CreatedAt: timePtr(time.Unix(10, 0)),
+				},
+			},
+			pull: github.PullRequest{
+				Number: intPtr(1),
+				Head: &github.PullRequestBranch{
+					Repo: &github.Repository{
+						PushedAt: &github.Timestamp{time.Unix(9, 0)},
+					},
+				},
+			},
+			shouldPass: true,
+		},
+		{
+			issueEvents: []github.IssueEvent{
+				{
+					Event: stringPtr("labeled"),
+					Label: &github.Label{
+						Name: stringPtr("lgtm"),
+					},
+					CreatedAt: timePtr(time.Unix(10, 0)),
+				},
+			},
+			pull: github.PullRequest{
+				Number: intPtr(1),
+				Head: &github.PullRequestBranch{
+					Repo: &github.Repository{
+						PushedAt: &github.Timestamp{time.Unix(11, 0)},
+					},
+				},
+			},
+			shouldPass: false,
+		},
+	}
+	for _, test := range tests {
+		client, server, mux := initTest()
+		mux.HandleFunc(fmt.Sprintf("/repos/o/r/issues/%d/events", test.pull.Number), func(w http.ResponseWriter, r *http.Request) {
+			if r.Method != "GET" {
+				t.Errorf("Unexpected method: %s", r.Method)
+			}
+			w.WriteHeader(http.StatusOK)
+			data, err := json.Marshal(test.issueEvents)
+			if err != nil {
+				t.Errorf("Unexpected error: %v", err)
+			}
+			w.Write(data)
+			ok, err := validateLGTMAfterPush(client, "o", "r", &test.pull)
+			if err != nil {
+				t.Errorf("unexpected error: %v", err)
+			}
+			if ok != test.shouldPass {
+				t.Errorf("expected: %v, saw: %v", test.shouldPass, ok)
+			}
+		})
+		server.Close()
+	}
+}