diff --git a/.teamcity/components/settings.kt b/.teamcity/components/settings.kt
index ed4097965467..48bbbe8faec6 100644
--- a/.teamcity/components/settings.kt
+++ b/.teamcity/components/settings.kt
@@ -85,6 +85,9 @@ var serviceTestConfigurationOverrides = mapOf(
         // Elastic can't provision many in parallel
         "elastic" to testConfiguration(parallelism = 1),
 
+        // ElasticSAN has 5 instance quota per subscription per region
+        "elasticsan" to testConfiguration(parallelism = 4),
+
         // HPC Cache has a 4 instance per subscription quota as of early 2021
         "hpccache" to testConfiguration(parallelism = 3, daysOfWeek = "2,4,6"),
 
diff --git a/internal/services/elasticsan/elastic_san_resource_test.go b/internal/services/elasticsan/elastic_san_resource_test.go
index 05e92c683a0e..b84f07990a37 100644
--- a/internal/services/elasticsan/elastic_san_resource_test.go
+++ b/internal/services/elasticsan/elastic_san_resource_test.go
@@ -143,7 +143,7 @@ func TestAccElasticSAN_reduceBaseSize(t *testing.T) {
 		data.ImportStep(),
 		{
 			Config:      r.basic(data),
-			ExpectError: regexp.MustCompile("base_size_in_tib cannot be reduced"),
+			ExpectError: regexp.MustCompile("new base_size_in_tib should be greater than the existing one"),
 		},
 		data.ImportStep(),
 	})