diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/Makefile b/sysdeps/ieee754/ldbl-128ibm-compat/Makefile
index 83c2c43ea4..6f1794fac8 100644
--- a/sysdeps/ieee754/ldbl-128ibm-compat/Makefile
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/Makefile
@@ -13,6 +13,12 @@ ldbl-extra-routines += isoc99_fwscanf \
 		       isoc99_vfwscanf \
 		       isoc99_vswscanf \
 		       isoc99_vwscanf
+
+tests-internal += test-wcstold-ibm128 test-wcstold-ieee128
+CFLAGS-test-wcstold-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi
+CFLAGS-test-wcstold-ibm128.c += -mabi=ibmlongdouble -Wno-psabi
+
+$(objpfx)test-wcstold-ieee128: gnulib-tests += $(f128-loader-link)
 endif
 
 ifeq ($(subdir),stdio-common)
@@ -287,6 +293,12 @@ CFLAGS-test-strfmon-ibm128.c += -mabi=ibmlongdouble -Wno-psabi
 CFLAGS-test-strfmon-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi
 $(objpfx)tst-strfmon-ibm128.out: $(gen-locales)
 $(objpfx)tst-strfmon-ieee128.out: $(gen-locales)
+
+tests-internal += test-strfrom-ibm128 test-strfrom-ieee128
+CFLAGS-test-strfrom-ieee128.c += -mfloat128 -mabi=ieeelongdouble -Wno-psabi
+CFLAGS-test-strfrom-ibm128.c += -mabi=ibmlongdouble -Wno-psabi
+
+$(objpfx)test-strfrom-ieee128: gnulib-tests += $(f128-loader-link)
 endif
 
 # Add IEEE binary128 files as make targets.
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/test-strfrom-ibm128.c b/sysdeps/ieee754/ldbl-128ibm-compat/test-strfrom-ibm128.c
new file mode 100644
index 0000000000..93887706b9
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/test-strfrom-ibm128.c
@@ -0,0 +1 @@
+#include <test-strfrom-ldbl-compat.c>
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/test-strfrom-ieee128.c b/sysdeps/ieee754/ldbl-128ibm-compat/test-strfrom-ieee128.c
new file mode 100644
index 0000000000..93887706b9
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/test-strfrom-ieee128.c
@@ -0,0 +1 @@
+#include <test-strfrom-ldbl-compat.c>
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/test-strfrom-ldbl-compat.c b/sysdeps/ieee754/ldbl-128ibm-compat/test-strfrom-ldbl-compat.c
new file mode 100644
index 0000000000..f32548fe90
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/test-strfrom-ldbl-compat.c
@@ -0,0 +1,49 @@
+/* Test for the long double variants of strfroml and strtold.
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdlib.h>
+
+#include <support/check.h>
+
+static int
+do_test (void)
+{
+  int written;
+  char buffer[64];
+  char *bufptr = buffer;
+  const char *expected = "-1.0000000000";
+  long double read;
+
+  /* Write to the buffer.  */
+  written = strfroml (bufptr, 64, "%.10f", (long double) -1);
+  if (written < 0)
+    support_record_failure ();
+
+  /* Compare against the expected output.  */
+  TEST_COMPARE_STRING (expected, buffer);
+
+  /* Read from the buffer.  */
+  read = strtold (expected, NULL);
+
+  if (read != (long double) -1)
+    support_record_failure ();
+
+  return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/test-wcstold-ibm128.c b/sysdeps/ieee754/ldbl-128ibm-compat/test-wcstold-ibm128.c
new file mode 100644
index 0000000000..4d60692eeb
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/test-wcstold-ibm128.c
@@ -0,0 +1 @@
+#include <test-wcstold-ldbl-compat.c>
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/test-wcstold-ieee128.c b/sysdeps/ieee754/ldbl-128ibm-compat/test-wcstold-ieee128.c
new file mode 100644
index 0000000000..4d60692eeb
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/test-wcstold-ieee128.c
@@ -0,0 +1 @@
+#include <test-wcstold-ldbl-compat.c>
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/test-wcstold-ldbl-compat.c b/sysdeps/ieee754/ldbl-128ibm-compat/test-wcstold-ldbl-compat.c
new file mode 100644
index 0000000000..8b9e300147
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/test-wcstold-ldbl-compat.c
@@ -0,0 +1,36 @@
+/* Test for the long double variant of wcstold.
+   Copyright (C) 2019 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <wchar.h>
+
+#include <support/check.h>
+
+static int
+do_test (void)
+{
+  const wchar_t *input = L"-1.0000000000";
+  long double read;
+
+  read = wcstold (input, NULL);
+  if (read != (long double) -1)
+    support_record_failure ();
+
+  return 0;
+}
+
+#include <support/test-driver.c>
