diff --git a/paddle/fluid/string/printf_test.cc b/paddle/fluid/string/printf_test.cc
index 678029f93534ab374bd29083f8991d632ccdd5a1..544b12ef3a877a6e84c136433799301edaa4abdf 100644
--- a/paddle/fluid/string/printf_test.cc
+++ b/paddle/fluid/string/printf_test.cc
@@ -27,4 +27,5 @@ TEST(StringPrintf, StringPrintf) {
   EXPECT_EQ(std::string("Wednesday, July 27, 14:44"),
             paddle::string::Sprintf("%s, %s %d, %.2d:%.2d", weekday, month, day,
                                     hour, min));
+  EXPECT_EQ(std::string(""), paddle::string::Sprintf());
 }