diff --git a/tests/cloudsqlpg/cloud_sql_pg_create_instances_test.go b/tests/cloudsqlpg/cloud_sql_pg_create_instances_test.go
index aaef8f5bcc..df7350801f 100644
--- a/tests/cloudsqlpg/cloud_sql_pg_create_instances_test.go
+++ b/tests/cloudsqlpg/cloud_sql_pg_create_instances_test.go
@@ -200,11 +200,10 @@ func TestCreateInstanceToolEndpoints(t *testing.T) {
 			want:     `{"name":"op2","status":"RUNNING"}`,
 		},
 		{
-			name:        "missing required parameter",
-			toolName:    "create-instance-prod",
-			body:        `{"name": "instance1"}`,
-			expectError: true,
-			errorStatus: http.StatusBadRequest,
+			name:     "missing required parameter",
+			toolName: "create-instance-prod",
+			body:     `{"name": "instance1"}`,
+			want:     `{"error":"parameter \"project\" is required"}`,
 		},
 	}
 
diff --git a/tests/cloudsqlpg/cloud_sql_pg_upgrade_precheck_test.go b/tests/cloudsqlpg/cloud_sql_pg_upgrade_precheck_test.go
index dd47981236..d0af4ab8e2 100644
--- a/tests/cloudsqlpg/cloud_sql_pg_upgrade_precheck_test.go
+++ b/tests/cloudsqlpg/cloud_sql_pg_upgrade_precheck_test.go
@@ -273,10 +273,11 @@ func TestPreCheckToolEndpoints(t *testing.T) {
 			want:     `{"preCheckResponse":[{"actionsRequired":["Fix this now."],"type":"","message":"This is a critical error.","messageType":"ERROR"}]}`,
 		},
 		{
-			name:     "instance not found",
-			toolName: "precheck-tool",
-			body:     `{"project": "p1", "instance": "instance-notfound", "targetDatabaseVersion": "POSTGRES_18"}`,
-			want:     `{"error":"Not authorized to access instance"}`,
+			name:        "instance not found",
+			toolName:    "precheck-tool",
+			body:        `{"project": "p1", "instance": "instance-notfound", "targetDatabaseVersion": "POSTGRES_18"}`,
+			want:        `{"error":"failed to access GCP resource: googleapi: got HTTP response code 403 with body: Not authorized to access instance\n"}`,
+			expectError: true,
 		},
 		{
 			name:     "missing required parameter - project",