diff --git a/tools/setup/postgres-init-dev-db b/tools/setup/postgres-init-dev-db
index 198a7e7f5c..940de6ab39 100755
--- a/tools/setup/postgres-init-dev-db
+++ b/tools/setup/postgres-init-dev-db
@@ -50,12 +50,20 @@ if ! pg_isready -U "$POSTGRES_USER" -q; then
 fi
 
 "${ROOT_POSTGRES[@]}" "$DEFAULT_DB" << EOF
-CREATE USER $USERNAME;
+DO \$\$BEGIN
+    CREATE USER $USERNAME;
+EXCEPTION WHEN duplicate_object THEN
+    RAISE NOTICE '$USERNAME user already exists';
+END\$\$;
 ALTER USER $USERNAME PASSWORD '$PASSWORD';
 ALTER USER $USERNAME CREATEDB;
 ALTER ROLE $USERNAME SET search_path TO $SEARCH_PATH;
 
-CREATE USER $VAGRANTUSERNAME;
+DO \$\$BEGIN
+    CREATE USER $VAGRANTUSERNAME;
+EXCEPTION WHEN duplicate_object THEN
+    RAISE NOTICE '$VAGRANTUSERNAME user already exists';
+END\$\$;
 GRANT $USERNAME TO $VAGRANTUSERNAME;
 ALTER ROLE $VAGRANTUSERNAME SET search_path TO $SEARCH_PATH;
 EOF