diff --git a/port/linux/.vscode/launch.json b/port/linux/.vscode/launch.json
index 3b811c29f..ef84022ba 100644
--- a/port/linux/.vscode/launch.json
+++ b/port/linux/.vscode/launch.json
@@ -11,7 +11,7 @@
             "program": "${workspaceFolder}/build/test/pikascript_test",
             // "program": "${workspaceFolder}/build/boot/demo06-pikamain/pikascript_demo06-pikamain",
             "args": [
-                // "--gtest_filter=module.__init__"
+                // "--gtest_filter=string.format_parse1"
             ],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
diff --git a/port/linux/test/string-test.cpp b/port/linux/test/string-test.cpp
index 411dd18ec..25d837103 100644
--- a/port/linux/test/string-test.cpp
+++ b/port/linux/test/string-test.cpp
@@ -32,7 +32,6 @@ TEST(string, cformat1) {
 }
 #endif
 
-
 #if PIKA_SYNTEX_ITEM_FORMAT_ENABLE
 TEST(string, format1) {
     /* init */
@@ -84,4 +83,23 @@ TEST(string, print_file) {
 
     EXPECT_EQ(pikaMemNow(), 0);
 }
-#endif
\ No newline at end of file
+#endif
+
+#if PIKA_SYNTEX_ITEM_FORMAT_ENABLE
+TEST(string, format_parse1) {
+    pikaMemInfo.heapUsedMax = 0;
+    Args* buffs = New_strBuff();
+    char* lines = "print('tes:%0.2f'% mem.getMax())";
+    printf("%s\n", lines);
+    char* pikaAsm = Parser_multiLineToAsm(buffs, lines);
+    printf("%s", pikaAsm);
+    EXPECT_STREQ(pikaAsm,
+                 "B0\n"
+                 "2 STR tes:%0.2f\n"
+                 "2 RUN mem.getMax\n"
+                 "1 RUN cformat\n"
+                 "0 RUN print\n");
+    args_deinit(buffs);
+    EXPECT_EQ(pikaMemNow(), 0);
+}
+#endif
diff --git a/src/PikaParser.c b/src/PikaParser.c
index 7002dd402..9eabe530a 100644
--- a/src/PikaParser.c
+++ b/src/PikaParser.c
@@ -999,7 +999,7 @@ char* Parser_solveFormat(Args* outBuffs, char* right) {
     Arg* var_buf = arg_setStr(NULL, "", "");
     PIKA_BOOL is_in_format = PIKA_FALSE;
     PIKA_BOOL is_tuple = PIKA_FALSE;
-    PIKA_BOOL is_out_tuple = PIKA_FALSE;
+    PIKA_BOOL is_out_vars = PIKA_FALSE;
     Args buffs = {0};
     char* fmt = NULL;
     ParserState_forEachToken(ps, right) {
@@ -1029,33 +1029,33 @@ char* Parser_solveFormat(Args* outBuffs, char* right) {
                 /* is a tuple */
                 if (strEqu(ps.token2.pyload, "(")) {
                     is_tuple = PIKA_TRUE;
+                } else {
+                    var_buf = arg_strAppend(var_buf, ps.token2.pyload);
                 }
                 goto iter_continue;
             }
-            if (!is_tuple) {
-                str_buf = arg_strAppend(str_buf, "cformat(");
-                str_buf = arg_strAppend(str_buf, fmt);
-                str_buf = arg_strAppend(str_buf, ",");
-                str_buf = arg_strAppend(str_buf, ps.token1.pyload);
-                str_buf = arg_strAppend(str_buf, ")");
+            /* found the end of tuple */
+            if (ps.iter_index == ps.length) {
+                is_out_vars = PIKA_TRUE;
                 is_in_format = PIKA_FALSE;
+            } else {
+                /* push the vars inner the tuple */
+                var_buf = arg_strAppend(var_buf, ps.token2.pyload);
             }
-            if (is_tuple) {
-                /* found the end of tuple */
-                if (ps.branket_deepth == 0 && strEqu(ps.token1.pyload, ")")) {
-                    is_out_tuple = 1;
-                    is_in_format = PIKA_FALSE;
+            if (is_out_vars) {
+                if (is_tuple) {
+                    str_buf = arg_strAppend(str_buf, "cformat(");
+                    str_buf = arg_strAppend(str_buf, fmt);
+                    str_buf = arg_strAppend(str_buf, ",");
+                    str_buf = arg_strAppend(str_buf, arg_getStr(var_buf));
                 } else {
-                    /* push the vars inner the tuple */
-                    var_buf = arg_strAppend(var_buf, ps.token2.pyload);
+                    str_buf = arg_strAppend(str_buf, "cformat(");
+                    str_buf = arg_strAppend(str_buf, fmt);
+                    str_buf = arg_strAppend(str_buf, ",");
+                    str_buf = arg_strAppend(str_buf, arg_getStr(var_buf));
+                    str_buf = arg_strAppend(str_buf, ")");
                 }
             }
-            if (is_out_tuple) {
-                str_buf = arg_strAppend(str_buf, "cformat(");
-                str_buf = arg_strAppend(str_buf, fmt);
-                str_buf = arg_strAppend(str_buf, ",");
-                str_buf = arg_strAppend(str_buf, arg_getStr(var_buf));
-            }
         }
     iter_continue:
         if (!is_in_format) {