diff --git a/stdlib/sql_test.go b/stdlib/sql_test.go
index 7b77ab57..06e5d046 100644
--- a/stdlib/sql_test.go
+++ b/stdlib/sql_test.go
@@ -7,6 +7,7 @@ import (
 	"database/sql/driver"
 	"encoding/json"
 	"math"
+	"os"
 	"reflect"
 	"testing"
 	"time"
@@ -75,7 +76,7 @@ func closeStmt(t *testing.T, stmt *sql.Stmt) {
 }
 
 func TestSQLOpen(t *testing.T) {
-	db, err := sql.Open("pgx", "postgres://pgx_md5:secret@127.0.0.1:5432/pgx_test")
+	db, err := sql.Open("pgx", os.Getenv("PGX_TEST_DATABASE"))
 	if err != nil {
 		t.Fatalf("sql.Open failed: %v", err)
 	}
@@ -1055,7 +1056,7 @@ func TestRowsColumnTypes(t *testing.T) {
 }
 
 func TestSimpleQueryLifeCycle(t *testing.T) {
-	config, err := pgx.ParseConfig("postgres://pgx_md5:secret@127.0.0.1:5432/pgx_test")
+	config, err := pgx.ParseConfig(os.Getenv("PGX_TEST_DATABASE"))
 	if err != nil {
 		t.Fatalf("pgx.ParseConnectionString failed: %v", err)
 	}
diff --git a/stdlib/stdlibutil110_test.go b/stdlib/stdlibutil110_test.go
index d87c9b64..fea4e2c4 100644
--- a/stdlib/stdlibutil110_test.go
+++ b/stdlib/stdlibutil110_test.go
@@ -4,6 +4,7 @@ package stdlib_test
 
 import (
 	"database/sql"
+	"os"
 	"testing"
 
 	"github.com/jackc/pgx/v4"
@@ -11,7 +12,7 @@ import (
 )
 
 func openDB(t *testing.T) *sql.DB {
-	config, err := pgx.ParseConfig("postgres://pgx_md5:secret@127.0.0.1:5432/pgx_test")
+	config, err := pgx.ParseConfig(os.Getenv("PGX_TEST_DATABASE"))
 	if err != nil {
 		t.Fatalf("pgx.ParseConnectionString failed: %v", err)
 	}
diff --git a/stdlib/stdlibutil_test.go b/stdlib/stdlibutil_test.go
index 31ea391c..58b3ff5b 100644
--- a/stdlib/stdlibutil_test.go
+++ b/stdlib/stdlibutil_test.go
@@ -4,12 +4,13 @@ package stdlib_test
 
 import (
 	"database/sql"
+	"os"
 	"testing"
 )
 
 // this file contains utility functions for tests that differ between versions.
 func openDB(t *testing.T) *sql.DB {
-	db, err := sql.Open("pgx", "postgres://pgx_md5:secret@127.0.0.1:5432/pgx_test")
+	db, err := sql.Open("pgx", os.Getenv("PGX_TEST_DATABASE"))
 	if err != nil {
 		t.Fatalf("sql.Open failed: %v", err)
 	}