diff --git a/pkg/detectors/sendgrid/sendgrid.go b/pkg/detectors/sendgrid/sendgrid.go
index 6b73c1c08..0a4045b7b 100644
--- a/pkg/detectors/sendgrid/sendgrid.go
+++ b/pkg/detectors/sendgrid/sendgrid.go
@@ -13,13 +13,15 @@ import (
 	"github.com/trufflesecurity/trufflehog/v3/pkg/common"
 )
 
-type Scanner struct{}
+type Scanner struct {
+	client *http.Client
+}
 
 // Ensure the Scanner satisfies the interface at compile time.
 var _ detectors.Detector = (*Scanner)(nil)
 
 var (
-	client = common.SaneHttpClient()
+	defaultClient = common.SaneHttpClient()
 
 	keyPat = regexp.MustCompile(detectors.PrefixRegex([]string{"sendgrid"}) + `(SG\.[\w\-_]{20,24}\.[\w\-_]{39,50})\b`)
 )
@@ -42,7 +44,7 @@ func (s Scanner) FromData(ctx context.Context, verify bool, data []byte) (result
 		}
 		res := strings.TrimSpace(match[1])
 
-		s := detectors.Result{
+		s1 := detectors.Result{
 			DetectorType: detectorspb.DetectorType_SendGrid,
 			Raw:          []byte(res),
 		}
@@ -52,6 +54,11 @@ func (s Scanner) FromData(ctx context.Context, verify bool, data []byte) (result
 			// 403 will be issued if the scope is wrong but the key is correct
 			baseURL := "https://api.sendgrid.com/v3/templates"
 
+			client := s.client
+			if client == nil {
+				client = defaultClient
+			}
+
 			// test `read_user` scope
 			req, err := http.NewRequestWithContext(ctx, "GET", baseURL, nil)
 			if err != nil {
@@ -67,16 +74,18 @@ func (s Scanner) FromData(ctx context.Context, verify bool, data []byte) (result
 				// 403 means good key but not the right scope
 				// 401 is bad key
 				if res.StatusCode == http.StatusOK || res.StatusCode == http.StatusForbidden {
-					s.Verified = true
+					s1.Verified = true
+				} else if res.StatusCode != http.StatusUnauthorized {
+					s1.VerificationError = fmt.Errorf("unexpected HTTP response status %d", res.StatusCode)
 				}
 			}
 		}
 
-		if !s.Verified && detectors.IsKnownFalsePositive(string(s.Raw), detectors.DefaultFalsePositives, true) {
+		if !s1.Verified && detectors.IsKnownFalsePositive(string(s1.Raw), detectors.DefaultFalsePositives, true) {
 			continue
 		}
 
-		results = append(results, s)
+		results = append(results, s1)
 	}
 
 	return
diff --git a/pkg/detectors/sendgrid/sendgrid_test.go b/pkg/detectors/sendgrid/sendgrid_test.go
index 15cebf037..bd95329da 100644
--- a/pkg/detectors/sendgrid/sendgrid_test.go
+++ b/pkg/detectors/sendgrid/sendgrid_test.go
@@ -9,7 +9,8 @@ import (
 	"testing"
 	"time"
 
-	"github.com/kylelemons/godebug/pretty"
+	"github.com/google/go-cmp/cmp"
+	"github.com/google/go-cmp/cmp/cmpopts"
 	"github.com/trufflesecurity/trufflehog/v3/pkg/common"
 	"github.com/trufflesecurity/trufflehog/v3/pkg/detectors"
 	"github.com/trufflesecurity/trufflehog/v3/pkg/pb/detectorspb"
@@ -18,7 +19,7 @@ import (
 func TestSendgrid_FromChunk(t *testing.T) {
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
 	defer cancel()
-	testSecrets, err := common.GetSecret(ctx, "trufflehog-testing", "detectors2")
+	testSecrets, err := common.GetSecret(ctx, "trufflehog-testing", "detectors5")
 	if err != nil {
 		t.Fatalf("could not get test secrets from GCP: %s", err)
 	}
@@ -30,11 +31,12 @@ func TestSendgrid_FromChunk(t *testing.T) {
 		verify bool
 	}
 	tests := []struct {
-		name    string
-		s       Scanner
-		args    args
-		want    []detectors.Result
-		wantErr bool
+		name                string
+		s                   Scanner
+		args                args
+		want                []detectors.Result
+		wantErr             bool
+		wantVerificationErr bool
 	}{
 		{
 			name: "found, verified",
@@ -50,7 +52,8 @@ func TestSendgrid_FromChunk(t *testing.T) {
 					Verified:     true,
 				},
 			},
-			wantErr: false,
+			wantErr:             false,
+			wantVerificationErr: false,
 		},
 		{
 			name: "found, unverified",
@@ -66,7 +69,8 @@ func TestSendgrid_FromChunk(t *testing.T) {
 					Verified:     false,
 				},
 			},
-			wantErr: false,
+			wantErr:             false,
+			wantVerificationErr: false,
 		},
 		{
 			name: "not found",
@@ -76,22 +80,54 @@ func TestSendgrid_FromChunk(t *testing.T) {
 				data:   []byte("You cannot find the secret within"),
 				verify: true,
 			},
-			want:    nil,
-			wantErr: false,
+			want:                nil,
+			wantErr:             false,
+			wantVerificationErr: false,
+		},
+		{
+			name: "found, would be verified if not for timeout",
+			s:    Scanner{client: common.SaneHttpClientTimeOut(1 * time.Microsecond)},
+			args: args{
+				ctx:    context.Background(),
+				data:   []byte(fmt.Sprintf("You can find a sendgrid secret %s within", secret)),
+				verify: true,
+			},
+			want: []detectors.Result{
+				{
+					DetectorType: detectorspb.DetectorType_SendGrid,
+					Verified:     false,
+				},
+			},
+			wantErr:             false,
+			wantVerificationErr: true,
+		},
+		{
+			name: "found, verified but unexpected api surface",
+			s:    Scanner{client: common.ConstantResponseHttpClient(404, "")},
+			args: args{
+				ctx:    context.Background(),
+				data:   []byte(fmt.Sprintf("You can find a sendgrid secret %s within", secret)),
+				verify: true,
+			},
+			want: []detectors.Result{
+				{
+					DetectorType: detectorspb.DetectorType_SendGrid,
+					Verified:     false,
+				},
+			},
+			wantErr:             false,
+			wantVerificationErr: true,
 		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			s := Scanner{}
-			got, err := s.FromData(tt.args.ctx, tt.args.verify, tt.args.data)
+			got, err := tt.s.FromData(tt.args.ctx, tt.args.verify, tt.args.data)
 			if (err != nil) != tt.wantErr {
 				t.Errorf("Sendgrid.FromData() error = %v, wantErr %v", err, tt.wantErr)
 				return
 			}
-			for i := range got {
-				got[i].Raw = nil
-			}
-			if diff := pretty.Compare(got, tt.want); diff != "" {
+			ignoreOpts := cmpopts.IgnoreFields(detectors.Result{}, "Raw", "VerificationError")
+			if diff := cmp.Diff(got, tt.want, ignoreOpts); diff != "" {
 				t.Errorf("Sendgrid.FromData() %s diff: (-got +want)\n%s", tt.name, diff)
 			}
 		})