diff --git a/tests/data/Makefile.inc b/tests/data/Makefile.inc
index 98efa13596..93a515f86e 100644
--- a/tests/data/Makefile.inc
+++ b/tests/data/Makefile.inc
@@ -219,7 +219,7 @@ test1700 test1701 test1702 test1703 \
 \
 test1800 test1801 \
 \
-                           test1903 test1904 test1905 test1906 test1907 \
+test1900                   test1903 test1904 test1905 test1906 test1907 \
 test1908 test1909 test1910 test1911 test1912 test1913 test1914 test1915 \
 test1916 test1917 test1918 test1919 \
 \
diff --git a/tests/data/test1900 b/tests/data/test1900
new file mode 100644
index 0000000000..f04e7e2af1
--- /dev/null
+++ b/tests/data/test1900
@@ -0,0 +1,38 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+HSTS
+</keywords>
+</info>
+
+# Server-side
+<reply>
+</reply>
+
+# Client-side
+<client>
+<features>
+HSTS
+http
+</features>
+<server>
+none
+</server>
+
+<name>
+HSTS curl_easy_duphandle
+</name>
+<tool>
+lib%TESTNUMBER
+</tool>
+
+<command>
+http://%HOSTIP:%NOLISTENPORT/not-there/%TESTNUMBER
+</command>
+</client>
+
+# Verify data after the test has been "shot"
+<verify>
+</verify>
+</testcase>
diff --git a/tests/libtest/Makefile.inc b/tests/libtest/Makefile.inc
index 85801e002a..d7f1de2a3b 100644
--- a/tests/libtest/Makefile.inc
+++ b/tests/libtest/Makefile.inc
@@ -65,6 +65,7 @@ noinst_PROGRAMS = chkhostname libauthretry libntlmconnect libprereq      \
  \
  lib1662 \
  \
+ lib1900 \
  lib1903 lib1905 lib1906 lib1907 lib1908 lib1910 lib1911 lib1912 lib1913 \
          lib1915 lib1916 lib1917 lib1918 lib1919 \
  lib1933 lib1934 lib1935 lib1936 lib1937 lib1938 lib1939 lib1940 \
@@ -530,6 +531,8 @@ lib1597_LDADD = $(TESTUTIL_LIBS)
 lib1662_SOURCES = lib1662.c $(SUPPORTFILES) $(TESTUTIL) $(WARNLESS)
 lib1662_LDADD = $(TESTUTIL_LIBS)
 
+lib1900_SOURCES = lib1900.c $(SUPPORTFILES)
+
 lib1903_SOURCES = lib1903.c $(SUPPORTFILES) $(TESTUTIL) $(WARNLESS)
 lib1903_LDADD = $(TESTUTIL_LIBS)
 
diff --git a/tests/libtest/lib1900.c b/tests/libtest/lib1900.c
new file mode 100644
index 0000000000..92f89c4c48
--- /dev/null
+++ b/tests/libtest/lib1900.c
@@ -0,0 +1,55 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * SPDX-License-Identifier: curl
+ *
+ ***************************************************************************/
+#include "test.h"
+
+#include "testutil.h"
+#include "warnless.h"
+#include "memdebug.h"
+
+int test(char *URL)
+{
+  CURLcode res = CURLE_OK;
+  CURL *hnd = NULL;
+  CURL *second = NULL;
+
+  global_init(CURL_GLOBAL_ALL);
+
+  easy_init(hnd);
+  easy_setopt(hnd, CURLOPT_URL, URL);
+  easy_setopt(hnd, CURLOPT_HSTS, "first-hsts.txt");
+  easy_setopt(hnd, CURLOPT_HSTS, "second-hsts.txt");
+
+  second = curl_easy_duphandle(hnd);
+
+  curl_easy_cleanup(hnd);
+  curl_easy_cleanup(second);
+  curl_global_cleanup();
+  return 0;
+
+test_cleanup:
+  curl_easy_cleanup(hnd);
+  curl_easy_cleanup(second);
+  curl_global_cleanup();
+  return (int)res;
+}