diff --git a/stdio-common/tst-printf-format-skeleton-double.c b/stdio-common/tst-printf-format-skeleton-double.c
index 03ac594736..19d75bbcbf 100644
--- a/stdio-common/tst-printf-format-skeleton-double.c
+++ b/stdio-common/tst-printf-format-skeleton-double.c
@@ -26,7 +26,7 @@
 #define PREC DBL_MANT_DIG
 typedef double type_t;
 static const type_t vals[] =
-  { -HUGE_VAL, -DBL_MAX, -DBL_MIN, copysign (0, -1), -NAN, NAN, 0, DBL_MIN,
+  { -HUGE_VAL, -DBL_MAX, -DBL_MIN, -0.0, -NAN, NAN, 0, DBL_MIN,
     DBL_MAX, HUGE_VAL };
 static const char length[] = "";
 
diff --git a/stdio-common/tst-printf-format-skeleton-ldouble.c b/stdio-common/tst-printf-format-skeleton-ldouble.c
index ed47e77963..cb58f1ab15 100644
--- a/stdio-common/tst-printf-format-skeleton-ldouble.c
+++ b/stdio-common/tst-printf-format-skeleton-ldouble.c
@@ -27,7 +27,7 @@
 #define PREC LDBL_MANT_DIG
 typedef long double type_t;
 static const type_t vals[] =
-  { -HUGE_VAL, -LDBL_MAX, -LDBL_MIN, copysign (0, -1), -NAN, NAN, 0, LDBL_MIN,
+  { -HUGE_VAL, -LDBL_MAX, -LDBL_MIN, -0.0, -NAN, NAN, 0, LDBL_MIN,
     LDBL_MAX, HUGE_VAL };
 static const char length[] = "L";