diff --git a/aws/data_source_aws_db_instance_test.go b/aws/data_source_aws_db_instance_test.go
index 4c33b5add96..17a7ac50e06 100644
--- a/aws/data_source_aws_db_instance_test.go
+++ b/aws/data_source_aws_db_instance_test.go
@@ -42,8 +42,11 @@ func TestAccAWSDbInstanceDataSource_basic(t *testing.T) {
 }
 
 func TestAccAWSDbInstanceDataSource_ec2Classic(t *testing.T) {
+	hardcodedRegion := "us-east-1" // lintignore:AWSAT003
+	testAccReachableRegionPreCheck(hardcodedRegion, t)
+
 	oldvar := os.Getenv("AWS_DEFAULT_REGION")
-	os.Setenv("AWS_DEFAULT_REGION", "us-east-1")
+	os.Setenv("AWS_DEFAULT_REGION", hardcodedRegion)
 	defer os.Setenv("AWS_DEFAULT_REGION", oldvar)
 
 	rInt := acctest.RandInt()
diff --git a/aws/provider_test.go b/aws/provider_test.go
index 763afb1c7eb..1ec3823c35a 100644
--- a/aws/provider_test.go
+++ b/aws/provider_test.go
@@ -497,6 +497,14 @@ func testAccGetThirdRegionPartition() string {
 	return "aws"
 }
 
+func testAccRDSCACertificateID() string {
+	v := os.Getenv("AWS_RDS_CA_CERTIFICATE_IDENTIFIER")
+	if v == "" {
+		return "rds-ca-2019"
+	}
+	return v
+}
+
 func testAccAlternateAccountPreCheck(t *testing.T) {
 	if os.Getenv("AWS_ALTERNATE_PROFILE") == "" && os.Getenv("AWS_ALTERNATE_ACCESS_KEY_ID") == "" {
 		t.Fatal("AWS_ALTERNATE_ACCESS_KEY_ID or AWS_ALTERNATE_PROFILE must be set for acceptance tests")
@@ -528,6 +536,15 @@ func testAccEC2ClassicPreCheck(t *testing.T) {
 	}
 }
 
+// testAccReachableRegionPreCheck checks whether the partition of the current region includes the given region
+func testAccReachableRegionPreCheck(region string, t *testing.T) {
+	if partition, ok := endpoints.PartitionForRegion(endpoints.DefaultPartitions(), testAccGetRegion()); ok {
+		if _, ok := partition.Regions()[region]; !ok {
+			t.Skip(fmt.Sprintf("skipping test; partition %s does not have %s region", partition.ID(), region))
+		}
+	}
+}
+
 func testAccEC2VPCOnlyPreCheck(t *testing.T) {
 	client := testAccProvider.Meta().(*AWSClient)
 	platforms := client.supportedplatforms
diff --git a/aws/resource_aws_db_instance_test.go b/aws/resource_aws_db_instance_test.go
index 8e1e0fb4730..fe54673837d 100644
--- a/aws/resource_aws_db_instance_test.go
+++ b/aws/resource_aws_db_instance_test.go
@@ -1110,7 +1110,6 @@ func TestAccAWSDBInstance_ReplicateSourceDb_CACertificateIdentifier(t *testing.T
 	var dbInstance, sourceDbInstance rds.DBInstance
 
 	rName := acctest.RandomWithPrefix("tf-acc-test")
-	caName := "rds-ca-2019"
 	sourceResourceName := "aws_db_instance.source"
 	resourceName := "aws_db_instance.test"
 
@@ -1120,13 +1119,13 @@ func TestAccAWSDBInstance_ReplicateSourceDb_CACertificateIdentifier(t *testing.T
 		CheckDestroy: testAccCheckAWSDBInstanceDestroy,
 		Steps: []resource.TestStep{
 			{
-				Config: testAccAWSDBInstanceConfig_ReplicateSourceDb_CACertificateIdentifier(rName, caName),
+				Config: testAccAWSDBInstanceConfig_ReplicateSourceDb_CACertificateIdentifier(rName, testAccRDSCACertificateID()),
 				Check: resource.ComposeTestCheckFunc(
 					testAccCheckAWSDBInstanceExists(sourceResourceName, &sourceDbInstance),
 					testAccCheckAWSDBInstanceExists(resourceName, &dbInstance),
 					testAccCheckAWSDBInstanceReplicaAttributes(&sourceDbInstance, &dbInstance),
-					resource.TestCheckResourceAttr(sourceResourceName, "ca_cert_identifier", caName),
-					resource.TestCheckResourceAttr(resourceName, "ca_cert_identifier", caName),
+					resource.TestCheckResourceAttr(sourceResourceName, "ca_cert_identifier", testAccRDSCACertificateID()),
+					resource.TestCheckResourceAttr(resourceName, "ca_cert_identifier", testAccRDSCACertificateID()),
 				),
 			},
 		},
@@ -2234,12 +2233,14 @@ func TestAccAWSDBInstance_MinorVersion(t *testing.T) {
 }
 
 func TestAccAWSDBInstance_ec2Classic(t *testing.T) {
-	var v rds.DBInstance
+	hardcodedRegion := "us-east-1" // lintignore:AWSAT003
+	testAccReachableRegionPreCheck(hardcodedRegion, t)
 
 	oldvar := os.Getenv("AWS_DEFAULT_REGION")
-	os.Setenv("AWS_DEFAULT_REGION", "us-east-1")
+	os.Setenv("AWS_DEFAULT_REGION", hardcodedRegion)
 	defer os.Setenv("AWS_DEFAULT_REGION", oldvar)
 
+	var v rds.DBInstance
 	rInt := acctest.RandInt()
 
 	resource.ParallelTest(t, resource.TestCase{
@@ -2975,7 +2976,6 @@ func TestAccAWSDBInstance_CACertificateIdentifier(t *testing.T) {
 	var dbInstance rds.DBInstance
 
 	resourceName := "aws_db_instance.bar"
-	cacID := "rds-ca-2019"
 
 	resource.ParallelTest(t, resource.TestCase{
 		PreCheck:     func() { testAccPreCheck(t) },
@@ -2983,10 +2983,10 @@ func TestAccAWSDBInstance_CACertificateIdentifier(t *testing.T) {
 		CheckDestroy: testAccCheckAWSDBInstanceDestroy,
 		Steps: []resource.TestStep{
 			{
-				Config: testAccAWSDBInstanceConfig_WithCACertificateIdentifier(cacID),
+				Config: testAccAWSDBInstanceConfig_WithCACertificateIdentifier(testAccRDSCACertificateID()),
 				Check: resource.ComposeTestCheckFunc(
 					testAccCheckAWSDBInstanceExists(resourceName, &dbInstance),
-					resource.TestCheckResourceAttr(resourceName, "ca_cert_identifier", cacID),
+					resource.TestCheckResourceAttr(resourceName, "ca_cert_identifier", testAccRDSCACertificateID()),
 				),
 			},
 		},
@@ -3239,6 +3239,8 @@ resource "aws_s3_bucket_object" "xtrabackup_db" {
   etag   = filemd5("./testdata/mysql-5-6-xtrabackup.tar.gz")
 }
 
+data "aws_partition" "current" {}
+
 resource "aws_iam_role" "rds_s3_access_role" {
   name = "%[3]s-role"
 
@@ -3250,7 +3252,7 @@ resource "aws_iam_role" "rds_s3_access_role" {
       "Sid": "",
       "Effect": "Allow",
       "Principal": {
-        "Service": "rds.amazonaws.com"
+        "Service": "rds.${data.aws_partition.current.dns_suffix}"
       },
       "Action": "sts:AssumeRole"
     }
@@ -3399,8 +3401,7 @@ resource "aws_db_instance" "snapshot" {
 
 func testAccAWSDbInstanceConfig_MonitoringInterval(rName string, monitoringInterval int) string {
 	return fmt.Sprintf(`
-data "aws_partition" "current" {
-}
+data "aws_partition" "current" {}
 
 resource "aws_iam_role" "test" {
   name = %[1]q
@@ -3413,7 +3414,7 @@ resource "aws_iam_role" "test" {
       "Sid": "",
       "Effect": "Allow",
       "Principal": {
-        "Service": "monitoring.rds.amazonaws.com"
+        "Service": "monitoring.rds.${data.aws_partition.current.dns_suffix}"
       },
       "Action": "sts:AssumeRole"
     }
@@ -3491,8 +3492,7 @@ resource "aws_db_instance" "test" {
 
 func testAccAWSDbInstanceConfig_MonitoringRoleArn(rName string) string {
 	return fmt.Sprintf(`
-data "aws_partition" "current" {
-}
+data "aws_partition" "current" {}
 
 resource "aws_iam_role" "test" {
   name = %[1]q
@@ -3505,7 +3505,7 @@ resource "aws_iam_role" "test" {
       "Sid": "",
       "Effect": "Allow",
       "Principal": {
-        "Service": "monitoring.rds.amazonaws.com"
+        "Service": "monitoring.rds.${data.aws_partition.current.dns_suffix}"
       },
       "Action": "sts:AssumeRole"
     }
@@ -4047,6 +4047,8 @@ resource "aws_directory_service_directory" "bar" {
   }
 }
 
+data "aws_partition" "current" {}
+
 resource "aws_iam_role" "role" {
   name = "tf-acc-db-instance-mssql-domain-role-%[1]d"
 
@@ -4057,7 +4059,7 @@ resource "aws_iam_role" "role" {
     {
       "Action": "sts:AssumeRole",
       "Principal": {
-        "Service": "rds.amazonaws.com"
+        "Service": "rds.${data.aws_partition.current.dns_suffix}"
       },
       "Effect": "Allow",
       "Sid": ""
@@ -4069,7 +4071,7 @@ EOF
 
 resource "aws_iam_role_policy_attachment" "attatch-policy" {
   role       = aws_iam_role.role.name
-  policy_arn = "arn:aws:iam::aws:policy/service-role/AmazonRDSDirectoryServiceAccess"
+  policy_arn = "arn:${data.aws_partition.current.partition}:iam::aws:policy/service-role/AmazonRDSDirectoryServiceAccess"
 }
 `, rInt))
 }
@@ -4176,6 +4178,8 @@ resource "aws_directory_service_directory" "bar" {
   }
 }
 
+data "aws_partition" "current" {}
+
 resource "aws_iam_role" "role" {
   name = "tf-acc-db-instance-mssql-domain-role-%[1]d"
 
@@ -4186,7 +4190,7 @@ resource "aws_iam_role" "role" {
     {
       "Action": "sts:AssumeRole",
       "Principal": {
-        "Service": "rds.amazonaws.com"
+        "Service": "rds.${data.aws_partition.current.dns_suffix}"
       },
       "Effect": "Allow",
       "Sid": ""
@@ -4198,7 +4202,7 @@ EOF
 
 resource "aws_iam_role_policy_attachment" "attatch-policy" {
   role       = aws_iam_role.role.name
-  policy_arn = "arn:aws:iam::aws:policy/service-role/AmazonRDSDirectoryServiceAccess"
+  policy_arn = "arn:${data.aws_partition.current.partition}:iam::aws:policy/service-role/AmazonRDSDirectoryServiceAccess"
 }
 `, rInt))
 }
@@ -4309,6 +4313,8 @@ resource "aws_directory_service_directory" "foo" {
   }
 }
 
+data "aws_partition" "current" {}
+
 resource "aws_iam_role" "role" {
   name = "tf-acc-db-instance-mssql-domain-role-%[1]d"
 
@@ -4319,7 +4325,7 @@ resource "aws_iam_role" "role" {
     {
       "Action": "sts:AssumeRole",
       "Principal": {
-        "Service": "rds.amazonaws.com"
+        "Service": "rds.${data.aws_partition.current.dns_suffix}"
       },
       "Effect": "Allow",
       "Sid": ""
@@ -4331,7 +4337,7 @@ EOF
 
 resource "aws_iam_role_policy_attachment" "attatch-policy" {
   role       = aws_iam_role.role.name
-  policy_arn = "arn:aws:iam::aws:policy/service-role/AmazonRDSDirectoryServiceAccess"
+  policy_arn = "arn:${data.aws_partition.current.partition}:iam::aws:policy/service-role/AmazonRDSDirectoryServiceAccess"
 }
 `, rInt))
 }
@@ -5673,8 +5679,7 @@ resource "aws_db_instance" "test" {
 
 func testAccAWSDBInstanceConfig_ReplicateSourceDb_Monitoring(rName string, monitoringInterval int) string {
 	return composeConfig(testAccAWSDBInstanceConfig_orderableClassMysql(), fmt.Sprintf(`
-data "aws_partition" "current" {
-}
+data "aws_partition" "current" {}
 
 resource "aws_iam_role" "test" {
   name = %[1]q
@@ -5687,7 +5692,7 @@ resource "aws_iam_role" "test" {
       "Sid": "",
       "Effect": "Allow",
       "Principal": {
-        "Service": "monitoring.rds.amazonaws.com"
+        "Service": "monitoring.rds.${data.aws_partition.current.dns_suffix}"
       },
       "Action": "sts:AssumeRole"
     }
@@ -6472,8 +6477,7 @@ resource "aws_db_instance" "test" {
 
 func testAccAWSDBInstanceConfig_SnapshotIdentifier_Monitoring(rName string, monitoringInterval int) string {
 	return composeConfig(testAccAWSDBInstanceConfig_orderableClassMariadb(), fmt.Sprintf(`
-data "aws_partition" "current" {
-}
+data "aws_partition" "current" {}
 
 resource "aws_iam_role" "test" {
   name = %[1]q
@@ -6486,7 +6490,7 @@ resource "aws_iam_role" "test" {
       "Sid": "",
       "Effect": "Allow",
       "Principal": {
-        "Service": "monitoring.rds.amazonaws.com"
+        "Service": "monitoring.rds.${data.aws_partition.current.dns_suffix}"
       },
       "Action": "sts:AssumeRole"
     }
diff --git a/aws/resource_aws_db_option_group_test.go b/aws/resource_aws_db_option_group_test.go
index a7b9d506e09..12f70cec257 100644
--- a/aws/resource_aws_db_option_group_test.go
+++ b/aws/resource_aws_db_option_group_test.go
@@ -360,14 +360,14 @@ func TestAccAWSDBOptionGroup_OracleOptionsUpdate(t *testing.T) {
 		CheckDestroy: testAccCheckAWSDBOptionGroupDestroy,
 		Steps: []resource.TestStep{
 			{
-				Config: testAccAWSDBOptionGroupOracleEEOptionSettings(rName, "12.1.0.4.v1"),
+				Config: testAccAWSDBOptionGroupOracleEEOptionSettings(rName, "13.2.0.0.v2"),
 				Check: resource.ComposeTestCheckFunc(
 					testAccCheckAWSDBOptionGroupExists("aws_db_option_group.bar", &v),
 					resource.TestCheckResourceAttr(
 						"aws_db_option_group.bar", "name", rName),
 					resource.TestCheckResourceAttr(
 						"aws_db_option_group.bar", "option.#", "1"),
-					testAccCheckAWSDBOptionGroupOptionVersionAttribute(&v, "12.1.0.4.v1"),
+					testAccCheckAWSDBOptionGroupOptionVersionAttribute(&v, "13.2.0.0.v2"),
 				),
 			},
 			{
@@ -378,14 +378,14 @@ func TestAccAWSDBOptionGroup_OracleOptionsUpdate(t *testing.T) {
 				ImportStateVerifyIgnore: []string{"name_prefix", "option"},
 			},
 			{
-				Config: testAccAWSDBOptionGroupOracleEEOptionSettings(rName, "12.1.0.5.v1"),
+				Config: testAccAWSDBOptionGroupOracleEEOptionSettings(rName, "13.3.0.0.v2"),
 				Check: resource.ComposeTestCheckFunc(
 					testAccCheckAWSDBOptionGroupExists("aws_db_option_group.bar", &v),
 					resource.TestCheckResourceAttr(
 						"aws_db_option_group.bar", "name", rName),
 					resource.TestCheckResourceAttr(
 						"aws_db_option_group.bar", "option.#", "1"),
-					testAccCheckAWSDBOptionGroupOptionVersionAttribute(&v, "12.1.0.5.v1"),
+					testAccCheckAWSDBOptionGroupOptionVersionAttribute(&v, "13.3.0.0.v2"),
 				),
 			},
 		},
@@ -568,7 +568,7 @@ func testAccCheckAWSDBOptionGroupOptionSettingsIAMRole(optionGroup *rds.OptionGr
 		}
 
 		settingValue := aws.StringValue(optionGroup.Options[0].OptionSettings[0].Value)
-		iamArnRegExp := regexp.MustCompile(`^arn:aws:iam::\d{12}:role/.+`)
+		iamArnRegExp := regexp.MustCompile(fmt.Sprintf(`^arn:%s:iam::\d{12}:role/.+`, testAccGetPartition()))
 		if !iamArnRegExp.MatchString(settingValue) {
 			return fmt.Errorf("Expected option setting to be a valid IAM role but received %s", settingValue)
 		}
@@ -733,24 +733,26 @@ resource "aws_db_option_group" "bar" {
 
 func testAccAWSDBOptionGroupOptionSettingsIAMRole(r string) string {
 	return fmt.Sprintf(`
+data "aws_partition" "current" {}
+
 data "aws_iam_policy_document" "rds_assume_role" {
   statement {
     actions = ["sts:AssumeRole"]
 
     principals {
       type        = "Service"
-      identifiers = ["rds.amazonaws.com"]
+      identifiers = ["rds.${data.aws_partition.current.dns_suffix}"]
     }
   }
 }
 
 resource "aws_iam_role" "sql_server_backup" {
-  name               = "rds-backup-%s"
+  name               = "rds-backup-%[1]s"
   assume_role_policy = data.aws_iam_policy_document.rds_assume_role.json
 }
 
 resource "aws_db_option_group" "bar" {
-  name                     = "%s"
+  name                     = "%[1]s"
   option_group_description = "Test option group for terraform"
   engine_name              = "sqlserver-ex"
   major_engine_version     = "14.00"
@@ -764,7 +766,7 @@ resource "aws_db_option_group" "bar" {
     }
   }
 }
-`, r, r)
+`, r)
 }
 
 func testAccAWSDBOptionGroupOptionSettings_update(r string) string {
diff --git a/aws/resource_aws_db_security_group_test.go b/aws/resource_aws_db_security_group_test.go
index d82871b1e5b..e4899eae86f 100644
--- a/aws/resource_aws_db_security_group_test.go
+++ b/aws/resource_aws_db_security_group_test.go
@@ -16,11 +16,14 @@ import (
 )
 
 func TestAccAWSDBSecurityGroup_basic(t *testing.T) {
-	var v rds.DBSecurityGroup
+	hardcodedRegion := "us-east-1" // lintignore:AWSAT003
+	testAccReachableRegionPreCheck(hardcodedRegion, t)
 
 	oldvar := os.Getenv("AWS_DEFAULT_REGION")
-	os.Setenv("AWS_DEFAULT_REGION", "us-east-1")
+	os.Setenv("AWS_DEFAULT_REGION", hardcodedRegion)
 	defer os.Setenv("AWS_DEFAULT_REGION", oldvar)
+
+	var v rds.DBSecurityGroup
 	resourceName := "aws_db_security_group.test"
 	rName := fmt.Sprintf("tf-acc-%s", acctest.RandString(5))
 
diff --git a/aws/resource_aws_rds_cluster_instance_test.go b/aws/resource_aws_rds_cluster_instance_test.go
index a316c2a5d49..e990f138e86 100644
--- a/aws/resource_aws_rds_cluster_instance_test.go
+++ b/aws/resource_aws_rds_cluster_instance_test.go
@@ -865,10 +865,10 @@ func TestAccAWSRDSClusterInstance_CACertificateIdentifier(t *testing.T) {
 		CheckDestroy: testAccCheckAWSClusterDestroy,
 		Steps: []resource.TestStep{
 			{
-				Config: testAccAWSRDSClusterInstanceConfig_CACertificateIdentifier(rName, "rds-ca-2019"),
+				Config: testAccAWSRDSClusterInstanceConfig_CACertificateIdentifier(rName, testAccRDSCACertificateID()),
 				Check: resource.ComposeTestCheckFunc(
 					testAccCheckAWSClusterInstanceExists(resourceName, &dbInstance),
-					resource.TestCheckResourceAttr(resourceName, "ca_cert_identifier", "rds-ca-2019"),
+					resource.TestCheckResourceAttr(resourceName, "ca_cert_identifier", testAccRDSCACertificateID()),
 				),
 			},
 			{