diff --git a/docker-compose.yml b/docker-compose.yml
index 5945f06ab..f2c1b2b54 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -14,5 +14,3 @@ postgres:
     image: postgres
     ports:
         - "5432:5432"
-    environment:
-        POSTGRES_USER: ubuntu
diff --git a/plugins/postgresql/postgresql_test.go b/plugins/postgresql/postgresql_test.go
index ab17601b1..775087700 100644
--- a/plugins/postgresql/postgresql_test.go
+++ b/plugins/postgresql/postgresql_test.go
@@ -12,7 +12,7 @@ func TestPostgresqlGeneratesMetrics(t *testing.T) {
 	p := &Postgresql{
 		Servers: []*Server{
 			{
-				Address:   "host=localhost user=ubuntu sslmode=disable",
+				Address:   "host=localhost user=postgres sslmode=disable",
 				Databases: []string{"postgres"},
 			},
 		},
@@ -57,7 +57,7 @@ func TestPostgresqlTagsMetricsWithDatabaseName(t *testing.T) {
 	p := &Postgresql{
 		Servers: []*Server{
 			{
-				Address:   "host=localhost user=ubuntu sslmode=disable",
+				Address:   "host=localhost user=postgres sslmode=disable",
 				Databases: []string{"postgres"},
 			},
 		},
@@ -78,7 +78,7 @@ func TestPostgresqlDefaultsToAllDatabases(t *testing.T) {
 	p := &Postgresql{
 		Servers: []*Server{
 			{
-				Address: "host=localhost user=ubuntu sslmode=disable",
+				Address: "host=localhost user=postgres sslmode=disable",
 			},
 		},
 	}