diff --git a/encoding/protobq/integration_test.go b/encoding/protobq/integration_test.go
index 11c5291..b48d23d 100644
--- a/encoding/protobq/integration_test.go
+++ b/encoding/protobq/integration_test.go
@@ -41,21 +41,23 @@ func Test_Integration_PublicDataSets(t *testing.T) {
 			Message:   &publicv1.FilmLocation{},
 		},
 
-		{
-			ProjectID: "bigquery-public-data",
-			DatasetID: "hacker_news",
-			TableID:   "stories",
-			Limit:     10,
-			Message:   &publicv1.HackerNewsStory{},
-		},
+		// no longer accessible
+		// {
+		// 	ProjectID: "bigquery-public-data",
+		// 	DatasetID: "hacker_news",
+		// 	TableID:   "stories",
+		// 	Limit:     10,
+		// 	Message:   &publicv1.HackerNewsStory{},
+		// },
 
-		{
-			ProjectID: "bigquery-public-data",
-			DatasetID: "london_bicycles",
-			TableID:   "cycle_hire",
-			Limit:     10,
-			Message:   &publicv1.LondonBicycleRental{},
-		},
+		// no longer accessible
+		// {
+		// 	ProjectID: "bigquery-public-data",
+		// 	DatasetID: "london_bicycles",
+		// 	TableID:   "cycle_hire",
+		// 	Limit:     10,
+		// 	Message:   &publicv1.LondonBicycleRental{},
+		// },
 
 		{
 			ProjectID: "bigquery-public-data",
@@ -65,16 +67,17 @@ func Test_Integration_PublicDataSets(t *testing.T) {
 			Message:   &publicv1.SanFransiscoTransitStopTime{},
 		},
 
-		{
-			ProjectID: "bigquery-public-data",
-			DatasetID: "london_bicycles",
-			TableID:   "cycle_stations",
-			Limit:     10,
-			Message:   &publicv1.LondonBicycleStation{},
-			UnmarshalOptions: protobq.UnmarshalOptions{
-				DiscardUnknown: true, // Ignore non-snake case field "nbEmptyDocks".
-			},
-		},
+		// no longer accessible
+		// {
+		// 	ProjectID: "bigquery-public-data",
+		// 	DatasetID: "london_bicycles",
+		// 	TableID:   "cycle_stations",
+		// 	Limit:     10,
+		// 	Message:   &publicv1.LondonBicycleStation{},
+		// 	UnmarshalOptions: protobq.UnmarshalOptions{
+		// 		DiscardUnknown: true, // Ignore non-snake case field "nbEmptyDocks".
+		// 	},
+		// },
 
 		{
 			ProjectID: "bigquery-public-data",
diff --git a/encoding/protobq/marshal.go b/encoding/protobq/marshal.go
index 194e46d..d8ec633 100644
--- a/encoding/protobq/marshal.go
+++ b/encoding/protobq/marshal.go
@@ -272,7 +272,8 @@ func (o MarshalOptions) marshalEnumValue(
 		// Use 'null' for BQ rows to indicate that no value could be determined.
 		return nil, nil
 	}
-	return nil, fmt.Errorf("unknown enum number: %v", value.Enum())
+	path := fmt.Sprintf("%s.%s", field.Parent().FullName(), field.Name())
+	return nil, fmt.Errorf("unknown enum number: %v, fieldname: %v", value.Enum(), path)
 }
 
 func (o MarshalOptions) marshalWellKnownTypeValue(
diff --git a/encoding/protobq/marshal_test.go b/encoding/protobq/marshal_test.go
index 4451ad2..f901f3b 100644
--- a/encoding/protobq/marshal_test.go
+++ b/encoding/protobq/marshal_test.go
@@ -1,6 +1,7 @@
 package protobq
 
 import (
+	"fmt"
 	"testing"
 	"time"
 
@@ -380,12 +381,25 @@ func TestMarshalOptions_Marshal(t *testing.T) {
 				"enum_value": nil,
 			},
 		},
+		{
+			name: "disallow unknown enum values",
+			msg: &examplev1.ExampleEnum{
+				EnumValue: examplev1.ExampleEnum_Enum(100),
+			},
+			opt:      MarshalOptions{Schema: SchemaOptions{UseOneofFields: true}, DiscardUnknownEnumValues: false},
+			expected: nil,
+		},
 	} {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
 			actual, err := tt.opt.Marshal(tt.msg)
-			assert.NilError(t, err)
-			assert.DeepEqual(t, tt.expected, actual)
+			if tt.expected == nil {
+				fmt.Println(err)
+				assert.Error(t, err, "unknown enum number: 100, fieldname: einride.bigquery.example.v1.ExampleEnum.enum_value")
+			} else {
+				assert.NilError(t, err)
+				assert.DeepEqual(t, tt.expected, actual)
+			}
 		})
 	}
 }