diff --git a/mmv1/templates/terraform/constants/bigquery_dataset.go.erb b/mmv1/templates/terraform/constants/bigquery_dataset.go.erb
index 0e89a4a63500..3a5f4b930334 100644
--- a/mmv1/templates/terraform/constants/bigquery_dataset.go.erb
+++ b/mmv1/templates/terraform/constants/bigquery_dataset.go.erb
@@ -1,4 +1,4 @@
-const datasetIdRegexp = `[0-9A-Za-z_]+`
+const datasetIdRegexp = `^[0-9A-Za-z_]+$`
 
 func validateDatasetId(v interface{}, k string) (ws []string, errors []error) {
     value := v.(string)
diff --git a/mmv1/third_party/terraform/services/bigquery/resource_bigquery_dataset_test.go b/mmv1/third_party/terraform/services/bigquery/resource_bigquery_dataset_test.go
index a4bd6a1a5dea..f4c23fd09306 100644
--- a/mmv1/third_party/terraform/services/bigquery/resource_bigquery_dataset_test.go
+++ b/mmv1/third_party/terraform/services/bigquery/resource_bigquery_dataset_test.go
@@ -2,6 +2,8 @@ package bigquery_test
 
 import (
 	"fmt"
+	"regexp"
+	"strings"
 	"testing"
 
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
@@ -326,6 +328,47 @@ func TestAccBigQueryDataset_storageBillModel(t *testing.T) {
 	})
 }
 
+func TestAccBigQueryDataset_invalidCharacterInID(t *testing.T) {
+	t.Parallel()
+	// Not an acceptance test.
+	acctest.SkipIfVcr(t)
+
+	datasetID := fmt.Sprintf("tf_test_%s-with-hyphens", acctest.RandString(t, 10))
+
+	acctest.VcrTest(t, resource.TestCase{
+		PreCheck:                 func() { acctest.AccTestPreCheck(t) },
+		ProtoV5ProviderFactories: acctest.ProtoV5ProviderFactories(t),
+		CheckDestroy:             testAccCheckBigQueryDatasetDestroyProducer(t),
+		Steps: []resource.TestStep{
+			{
+				Config:      testAccBigQueryDataset(datasetID),
+				ExpectError: regexp.MustCompile("must contain only letters.+numbers.+or underscores.+"),
+			},
+		},
+	})
+}
+
+func TestAccBigQueryDataset_invalidLongID(t *testing.T) {
+	t.Parallel()
+	// Not an acceptance test.
+	acctest.SkipIfVcr(t)
+
+	datasetSuffix := acctest.RandString(t, 10)
+	datasetID := fmt.Sprintf("tf_test_%s", strings.Repeat(datasetSuffix, 200))
+
+	acctest.VcrTest(t, resource.TestCase{
+		PreCheck:                 func() { acctest.AccTestPreCheck(t) },
+		ProtoV5ProviderFactories: acctest.ProtoV5ProviderFactories(t),
+		CheckDestroy:             testAccCheckBigQueryDatasetDestroyProducer(t),
+		Steps: []resource.TestStep{
+			{
+				Config:      testAccBigQueryDataset(datasetID),
+				ExpectError: regexp.MustCompile(".+cannot be greater than 1,024 characters"),
+			},
+		},
+	})
+}
+
 func testAccAddTable(t *testing.T, datasetID string, tableID string) resource.TestCheckFunc {
 	// Not actually a check, but adds a table independently of terraform
 	return func(s *terraform.State) error {
diff --git a/mmv1/third_party/tgc/tests/data/example_bigquery_dataset.json b/mmv1/third_party/tgc/tests/data/example_bigquery_dataset.json
index c55d9a2c4ee6..427f48a3e41b 100644
--- a/mmv1/third_party/tgc/tests/data/example_bigquery_dataset.json
+++ b/mmv1/third_party/tgc/tests/data/example_bigquery_dataset.json
@@ -1,6 +1,6 @@
 [
   {
-    "name": "//bigquery.googleapis.com/projects/{{.Provider.project}}/datasets/test-dataset",
+    "name": "//bigquery.googleapis.com/projects/{{.Provider.project}}/datasets/test_dataset",
     "asset_type": "bigquery.googleapis.com/Dataset",
     "ancestry_path": "{{.Ancestry}}/project/{{.Provider.project}}",
     "resource": {
@@ -11,7 +11,7 @@
       "data": {
         "friendlyName": "",
         "datasetReference": {
-          "datasetId": "test-dataset"
+          "datasetId": "test_dataset"
         },
         "labels": {
           "env": "dev"
diff --git a/mmv1/third_party/tgc/tests/data/example_bigquery_dataset.tf b/mmv1/third_party/tgc/tests/data/example_bigquery_dataset.tf
index 44bd499f16c0..a72c95ae1fe6 100644
--- a/mmv1/third_party/tgc/tests/data/example_bigquery_dataset.tf
+++ b/mmv1/third_party/tgc/tests/data/example_bigquery_dataset.tf
@@ -28,7 +28,7 @@ provider "google" {
 }
 
 resource "google_bigquery_dataset" "default" {
-  dataset_id                  = "test-dataset"
+  dataset_id                  = "test_dataset"
   location                    = "EU"
   default_table_expiration_ms = 3600000
 
diff --git a/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_binding.json b/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_binding.json
index 770149249ec3..e76f11d2022e 100644
--- a/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_binding.json
+++ b/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_binding.json
@@ -1,6 +1,6 @@
 [
   {
-    "name": "//bigquery.googleapis.com/projects/{{.Provider.project}}/datasets/test-dataset",
+    "name": "//bigquery.googleapis.com/projects/{{.Provider.project}}/datasets/test_dataset",
     "asset_type": "bigquery.googleapis.com/Dataset",
     "ancestry_path": "{{.Ancestry}}/project/{{.Provider.project}}",
     "resource": {
@@ -10,7 +10,7 @@
       "parent": "//cloudresourcemanager.googleapis.com/projects/{{.Provider.project}}",
       "data": {
         "datasetReference": {
-          "datasetId": "test-dataset"
+          "datasetId": "test_dataset"
         },
         "defaultTableExpirationMs": 3600000,
         "labels": {
diff --git a/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_binding.tf b/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_binding.tf
index f8330b074568..12e8b8626361 100644
--- a/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_binding.tf
+++ b/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_binding.tf
@@ -28,7 +28,7 @@ provider "google" {
 }
 
 resource "google_bigquery_dataset" "example_dataset" {
-  dataset_id                  = "test-dataset"
+  dataset_id                  = "test_dataset"
   location                    = "EU"
   project                     = "{{.Provider.project}}"
   default_table_expiration_ms = 3600000
diff --git a/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_member.json b/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_member.json
index 7aed9ac6ce97..c0b0e3053ef5 100644
--- a/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_member.json
+++ b/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_member.json
@@ -1,6 +1,6 @@
 [
   {
-    "name": "//bigquery.googleapis.com/projects/{{.Provider.project}}/datasets/test-dataset",
+    "name": "//bigquery.googleapis.com/projects/{{.Provider.project}}/datasets/test_dataset",
     "asset_type": "bigquery.googleapis.com/Dataset",
     "ancestry_path": "{{.Ancestry}}/project/{{.Provider.project}}",
     "resource": {
@@ -10,7 +10,7 @@
       "parent": "//cloudresourcemanager.googleapis.com/projects/{{.Provider.project}}",
       "data": {
         "datasetReference": {
-          "datasetId": "test-dataset"
+          "datasetId": "test_dataset"
         },
         "defaultTableExpirationMs": 3600000,
         "labels": {
diff --git a/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_member.tf b/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_member.tf
index f7d87317adeb..337e4d1b7988 100644
--- a/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_member.tf
+++ b/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_member.tf
@@ -28,7 +28,7 @@ provider "google" {
 }
 
 resource "google_bigquery_dataset" "example_dataset" {
-  dataset_id                  = "test-dataset"
+  dataset_id                  = "test_dataset"
   location                    = "EU"
   project                     = "{{.Provider.project}}"
   default_table_expiration_ms = 3600000
diff --git a/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_policy.json b/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_policy.json
index 5908f8d7600c..f00a09b317b4 100644
--- a/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_policy.json
+++ b/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_policy.json
@@ -1,6 +1,6 @@
 [
   {
-    "name": "//bigquery.googleapis.com/projects/{{.Provider.project}}/datasets/test-dataset",
+    "name": "//bigquery.googleapis.com/projects/{{.Provider.project}}/datasets/test_dataset",
     "asset_type": "bigquery.googleapis.com/Dataset",
     "ancestry_path": "{{.Ancestry}}/project/{{.Provider.project}}",
     "resource": {
@@ -10,7 +10,7 @@
       "parent": "//cloudresourcemanager.googleapis.com/projects/{{.Provider.project}}",
       "data": {
         "datasetReference": {
-          "datasetId": "test-dataset"
+          "datasetId": "test_dataset"
         },
         "defaultTableExpirationMs": 3600000,
         "labels": {
diff --git a/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_policy.tf b/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_policy.tf
index ae6554fe8d28..89a2450aecb2 100644
--- a/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_policy.tf
+++ b/mmv1/third_party/tgc/tests/data/example_bigquery_dataset_iam_policy.tf
@@ -28,7 +28,7 @@ provider "google" {
 }
 
 resource "google_bigquery_dataset" "example-dataset" {
-  dataset_id                  = "test-dataset"
+  dataset_id                  = "test_dataset"
   location                    = "EU"
   project                     = "{{.Provider.project}}"
   default_table_expiration_ms = 3600000