diff --git a/tests/syntax/string_concat.c b/tests/syntax/string_concat.c
index 21e443baaba6d00542c5ffcbcf6450fa6e5b7f29..924e8b423c7f30720939ddfb15b23b5c78ddc01b 100644
--- a/tests/syntax/string_concat.c
+++ b/tests/syntax/string_concat.c
@@ -1,5 +1,5 @@
 /* run.config*
-TIMEOUT: 10
+TIMEOUT: 600
 OPT: -eva
 */
 
diff --git a/tests/syntax/wstring_concat.c b/tests/syntax/wstring_concat.c
index 3d9cf6e4936c0359c56947d6e55e559052ad8196..76f68ddd1b187f24f22591786cda9f13ce1a8209 100644
--- a/tests/syntax/wstring_concat.c
+++ b/tests/syntax/wstring_concat.c
@@ -1,5 +1,5 @@
 /* run.config*
-TIMEOUT: 10
+TIMEOUT: 600
 OPT: -eva
 */