diff --git a/mysql-test/main/create_not_windows.result b/mysql-test/main/create_not_windows.result
index 3ab2d56bf17..43860c2fdca 100644
--- a/mysql-test/main/create_not_windows.result
+++ b/mysql-test/main/create_not_windows.result
@@ -57,11 +57,11 @@ tttttttttttttttttttttttt❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎
 set @@debug_dbug="+d,ddl_log_create_after_save_backup", @debug_crash_counter=1;
 create or replace table tttttttttttttttttttttttt❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎ (z int);
 ERROR HY000: Lost connection to server during query
-#sql-backup-PID-TID-tttttttttttttttttttttttt@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e.MYD
-#sql-backup-PID-TID-tttttttttttttttttttttttt@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e.MYI
-#sql-backup-PID-TID-tttttttttttttttttttttttt@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e.frm
-#sql-create-PID-TID-tttttttttttttttttttttttt@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e.MYD
-#sql-create-PID-TID-tttttttttttttttttttttttt@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e.MYI
-#sql-create-PID-TID-tttttttttttttttttttttttt@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e.frm
+#sql-backup-PID-TID-tttttttttttttttttttttttt@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e.MYD
+#sql-backup-PID-TID-tttttttttttttttttttttttt@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e.MYI
+#sql-backup-PID-TID-tttttttttttttttttttttttt@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e.frm
+#sql-create-PID-TID-tttttttttttttttttttttttt@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e.MYD
+#sql-create-PID-TID-tttttttttttttttttttttttt@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e.MYI
+#sql-create-PID-TID-tttttttttttttttttttttttt@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e@274e.frm
 drop table tttttttttttttttttttttttt❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎❎;
 set @@debug_dbug="";
diff --git a/sql/sql_table.cc b/sql/sql_table.cc
index de71432a355..23dab5056c3 100644
--- a/sql/sql_table.cc
+++ b/sql/sql_table.cc
@@ -1251,13 +1251,19 @@ bool make_tmp_name(THD *thd, const char *prefix, const Table_name *orig,
   char res_name[NAME_LEN + 1];
   char file_name[NAME_LEN + 1];
   LEX_CSTRING table_name;
+  /*
+    Filename trimming should not depend on prefix length with variable PID and
+    thread ID. This makes tests happier.
+  */
+  constexpr int MIN_PREFIX= 30;
 
   size_t len= my_snprintf(res_name, sizeof(res_name) - 1,
                           tmp_file_prefix "-%s-%lx-%llx-", prefix,
                           current_pid, thd->thread_id);
 
+  const size_t pfx_len= len < MIN_PREFIX ? MIN_PREFIX : len;
   uint len2= tablename_to_filename(orig->table_name.str, file_name,
-                                   sizeof(res_name) - len - 1);
+                                   sizeof(res_name) - pfx_len - 1);
 
   DBUG_ASSERT(len + len2 < sizeof(res_name) - 1);
   memcpy(res_name + len, file_name, len2 + 1);