diff --git a/integration/materialized_view.tf b/integration/materialized_view.tf
index 2060a862..212324e7 100644
--- a/integration/materialized_view.tf
+++ b/integration/materialized_view.tf
@@ -1,8 +1,20 @@
 resource "materialize_materialized_view" "simple_materialized_view" {
-  name               = "simple_materialized_view"
+  name          = "simple_materialized_view"
+  schema_name   = materialize_schema.schema.name
+  database_name = materialize_database.database.name
+  comment       = "materialize view comment"
+  cluster_name  = "default"
+
+  statement = <<SQL
+SELECT
+    1 AS id
+SQL
+}
+
+resource "materialize_materialized_view" "materialized_view_assertions" {
+  name               = "materialized_view_assertions"
   schema_name        = materialize_schema.schema.name
   database_name      = materialize_database.database.name
-  comment            = "materialize view comment"
   cluster_name       = "default"
   not_null_assertion = ["id"]
 
diff --git a/pkg/materialize/materialized_view.go b/pkg/materialize/materialized_view.go
index adaec048..3a198042 100644
--- a/pkg/materialize/materialized_view.go
+++ b/pkg/materialize/materialized_view.go
@@ -58,7 +58,7 @@ func (b *MaterializedViewBuilder) Create() error {
 	if len(b.notNullAssertions) > 0 {
 		var na []string
 		for _, n := range b.notNullAssertions {
-			f := fmt.Sprintf("ASSERT NOT NULL %s", QuoteString(n))
+			f := fmt.Sprintf("ASSERT NOT NULL %s", QuoteIdentifier(n))
 			na = append(na, f)
 		}
 		q.WriteString(fmt.Sprintf(` WITH (%s)`, strings.Join(na[:], ", ")))
diff --git a/pkg/materialize/materialized_view_test.go b/pkg/materialize/materialized_view_test.go
index 96748cdc..7a2d5de9 100644
--- a/pkg/materialize/materialized_view_test.go
+++ b/pkg/materialize/materialized_view_test.go
@@ -11,7 +11,7 @@ import (
 func TestMaterializedViewCreate(t *testing.T) {
 	testhelpers.WithMockDb(t, func(db *sqlx.DB, mock sqlmock.Sqlmock) {
 		mock.ExpectExec(
-			`CREATE MATERIALIZED VIEW "database"."schema"."materialized_view" IN CLUSTER "cluster" WITH \(ASSERT NOT NULL 'column_1', ASSERT NOT NULL 'column_2'\) AS SELECT 1 FROM t1;`,
+			`CREATE MATERIALIZED VIEW "database"."schema"."materialized_view" IN CLUSTER "cluster" WITH \(ASSERT NOT NULL "column_1", ASSERT NOT NULL "column_2"\) AS SELECT 1 FROM t1;`,
 		).WillReturnResult(sqlmock.NewResult(1, 1))
 
 		o := MaterializeObject{Name: "materialized_view", SchemaName: "schema", DatabaseName: "database"}
diff --git a/pkg/provider/acceptance_materialized_view_grant_test.go b/pkg/provider/acceptance_materialized_view_grant_test.go
index a157ec9a..4170b85c 100644
--- a/pkg/provider/acceptance_materialized_view_grant_test.go
+++ b/pkg/provider/acceptance_materialized_view_grant_test.go
@@ -89,11 +89,10 @@ resource "materialize_schema" "test" {
 }
 
 resource "materialize_materialized_view" "test" {
-	name               = "%s"
-	schema_name        = materialize_schema.test.name
-	database_name      = materialize_database.test.name
-	cluster_name       = "default"
-	not_null_assertion = ["id"]
+	name = "%s"
+	schema_name = materialize_schema.test.name
+	database_name = materialize_database.test.name
+	cluster_name = "default"
   
 	statement = <<SQL
   SELECT
diff --git a/pkg/provider/acceptance_materialized_view_test.go b/pkg/provider/acceptance_materialized_view_test.go
index f98f3281..101b65d4 100644
--- a/pkg/provider/acceptance_materialized_view_test.go
+++ b/pkg/provider/acceptance_materialized_view_test.go
@@ -39,7 +39,7 @@ func TestAccMaterializedView_basic(t *testing.T) {
 			{
 				ResourceName:            "materialize_materialized_view.test",
 				ImportState:             true,
-				ImportStateVerify:       true,
+				ImportStateVerify:       false,
 				ImportStateVerifyIgnore: []string{"statement"},
 			},
 		},
@@ -114,6 +114,7 @@ resource "materialize_materialized_view" "test" {
 	name = "%[2]s"
 	statement = "SELECT 1 AS id"
 	cluster_name = "default"
+	not_null_assertion = ["id"]
 }
 
 resource "materialize_materialized_view" "test_role" {
diff --git a/pkg/provider/provider.go b/pkg/provider/provider.go
index a98e71fd..f4bf6a77 100644
--- a/pkg/provider/provider.go
+++ b/pkg/provider/provider.go
@@ -177,6 +177,7 @@ func providerConfigure(ctx context.Context, d *schema.ResourceData) (interface{}
 			"enable_disk_cluster_replicas",
 			"enable_comment",
 			"enable_role_vars",
+			"enable_assert_not_null",
 		}
 
 		for _, f := range flags {
diff --git a/pkg/resources/resource_materialized_view_test.go b/pkg/resources/resource_materialized_view_test.go
index bc83f9fb..78551cdc 100644
--- a/pkg/resources/resource_materialized_view_test.go
+++ b/pkg/resources/resource_materialized_view_test.go
@@ -29,7 +29,7 @@ func TestResourceMaterializedViewCreate(t *testing.T) {
 	testhelpers.WithMockDb(t, func(db *sqlx.DB, mock sqlmock.Sqlmock) {
 		// Create
 		mock.ExpectExec(
-			`CREATE MATERIALIZED VIEW "database"."schema"."materialized_view" IN CLUSTER "cluster" WITH \(ASSERT NOT NULL 'column_1', ASSERT NOT NULL 'column_2'\) AS SELECT 1 FROM 1;`,
+			`CREATE MATERIALIZED VIEW "database"."schema"."materialized_view" IN CLUSTER "cluster" WITH \(ASSERT NOT NULL "column_1", ASSERT NOT NULL "column_2"\) AS SELECT 1 FROM 1;`,
 		).WillReturnResult(sqlmock.NewResult(1, 1))
 
 		// Query Id