diff --git a/src/ast/mod.rs b/src/ast/mod.rs
index 3929d228b..1689b56c2 100644
--- a/src/ast/mod.rs
+++ b/src/ast/mod.rs
@@ -3513,7 +3513,7 @@ impl fmt::Display for OnInsert {
                 " ON DUPLICATE KEY UPDATE {}",
                 display_comma_separated(expr)
             ),
-            Self::OnConflict(o) => write!(f, " {o}"),
+            Self::OnConflict(o) => write!(f, "{o}"),
         }
     }
 }
diff --git a/tests/sqlparser_postgres.rs b/tests/sqlparser_postgres.rs
index d01322301..d17b2e825 100644
--- a/tests/sqlparser_postgres.rs
+++ b/tests/sqlparser_postgres.rs
@@ -1428,7 +1428,7 @@ fn parse_prepare() {
 fn parse_pg_on_conflict() {
     let stmt = pg_and_generic().verified_stmt(
         "INSERT INTO distributors (did, dname) \
-        VALUES (5, 'Gizmo Transglobal'), (6, 'Associated Computing, Inc')  \
+        VALUES (5, 'Gizmo Transglobal'), (6, 'Associated Computing, Inc') \
         ON CONFLICT(did) \
         DO UPDATE SET dname = EXCLUDED.dname",
     );
@@ -1458,7 +1458,7 @@ fn parse_pg_on_conflict() {
 
     let stmt = pg_and_generic().verified_stmt(
         "INSERT INTO distributors (did, dname, area) \
-        VALUES (5, 'Gizmo Transglobal', 'Mars'), (6, 'Associated Computing, Inc', 'Venus')  \
+        VALUES (5, 'Gizmo Transglobal', 'Mars'), (6, 'Associated Computing, Inc', 'Venus') \
         ON CONFLICT(did, area) \
         DO UPDATE SET dname = EXCLUDED.dname, area = EXCLUDED.area",
     );
@@ -1497,7 +1497,7 @@ fn parse_pg_on_conflict() {
 
     let stmt = pg_and_generic().verified_stmt(
         "INSERT INTO distributors (did, dname) \
-    VALUES (5, 'Gizmo Transglobal'), (6, 'Associated Computing, Inc')  \
+    VALUES (5, 'Gizmo Transglobal'), (6, 'Associated Computing, Inc') \
     ON CONFLICT DO NOTHING",
     );
     match stmt {
@@ -1516,7 +1516,7 @@ fn parse_pg_on_conflict() {
 
     let stmt = pg_and_generic().verified_stmt(
         "INSERT INTO distributors (did, dname, dsize) \
-        VALUES (5, 'Gizmo Transglobal', 1000), (6, 'Associated Computing, Inc', 1010)  \
+        VALUES (5, 'Gizmo Transglobal', 1000), (6, 'Associated Computing, Inc', 1010) \
         ON CONFLICT(did) \
         DO UPDATE SET dname = $1 WHERE dsize > $2",
     );
@@ -1553,7 +1553,7 @@ fn parse_pg_on_conflict() {
 
     let stmt = pg_and_generic().verified_stmt(
         "INSERT INTO distributors (did, dname, dsize) \
-        VALUES (5, 'Gizmo Transglobal', 1000), (6, 'Associated Computing, Inc', 1010)  \
+        VALUES (5, 'Gizmo Transglobal', 1000), (6, 'Associated Computing, Inc', 1010) \
         ON CONFLICT ON CONSTRAINT distributors_did_pkey \
         DO UPDATE SET dname = $1 WHERE dsize > $2",
     );