diff --git a/lib/common/tests/strings/Makefile.am b/lib/common/tests/strings/Makefile.am
index 7fb9ae71fc..3d8c26fd47 100644
--- a/lib/common/tests/strings/Makefile.am
+++ b/lib/common/tests/strings/Makefile.am
@@ -1,34 +1,35 @@
 #
 # Copyright 2020-2022 the Pacemaker project contributors
 #
 # The version control history for this file may have further details.
 #
 # This source code is licensed under the GNU General Public License version 2
 # or later (GPLv2+) WITHOUT ANY WARRANTY.
 #
 
 AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_builddir)/include
 LDADD = $(top_builddir)/lib/common/libcrmcommon.la -lcmocka
 
 include $(top_srcdir)/mk/tap.mk
 
 # Add "_test" to the end of all test program names to simplify .gitignore.
 check_PROGRAMS = \
 		crm_get_msec_test 	\
 		crm_is_true_test 	\
 		crm_str_to_boolean_test 	\
 		pcmk__add_word_test		\
 		pcmk__btoa_test			\
 		pcmk__char_in_any_str_test	\
 		pcmk__ends_with_test 		\
+		pcmk__numeric_strcasecmp_test \
 		pcmk__parse_ll_range_test	\
 		pcmk__scan_double_test		\
 		pcmk__scan_min_int_test		\
 		pcmk__scan_port_test		\
 		pcmk__starts_with_test 		\
 		pcmk__str_any_of_test		\
 		pcmk__str_in_list_test		\
 		pcmk__strcmp_test 			\
 		pcmk__trim_test
 
 TESTS = $(check_PROGRAMS)
diff --git a/lib/common/tests/strings/pcmk__numeric_strcasecmp_test.c b/lib/common/tests/strings/pcmk__numeric_strcasecmp_test.c
new file mode 100644
index 0000000000..4ead552563
--- /dev/null
+++ b/lib/common/tests/strings/pcmk__numeric_strcasecmp_test.c
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2022 the Pacemaker project contributors
+ *
+ * The version control history for this file may have further details.
+ *
+ * This source code is licensed under the GNU Lesser General Public License
+ * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
+ */
+
+#include <crm_internal.h>
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <setjmp.h>
+#include <cmocka.h>
+
+static void
+no_numbers(void **state)
+{
+    /* All comparisons are done case-insensitively. */
+    assert_int_equal(pcmk__numeric_strcasecmp("abcd", "efgh"), -1);
+    assert_int_equal(pcmk__numeric_strcasecmp("abcd", "abcd"), 0);
+    assert_int_equal(pcmk__numeric_strcasecmp("efgh", "abcd"), 1);
+
+    assert_int_equal(pcmk__numeric_strcasecmp("AbCd", "eFgH"), -1);
+    assert_int_equal(pcmk__numeric_strcasecmp("ABCD", "abcd"), 0);
+    assert_int_equal(pcmk__numeric_strcasecmp("EFgh", "ABcd"), 1);
+}
+
+static void
+trailing_numbers(void **state)
+{
+    assert_int_equal(pcmk__numeric_strcasecmp("node1", "node2"), -1);
+    assert_int_equal(pcmk__numeric_strcasecmp("node1", "node1"), 0);
+    assert_int_equal(pcmk__numeric_strcasecmp("node2", "node1"), 1);
+
+    assert_int_equal(pcmk__numeric_strcasecmp("node1", "node10"), -1);
+    assert_int_equal(pcmk__numeric_strcasecmp("node10", "node10"), 0);
+    assert_int_equal(pcmk__numeric_strcasecmp("node10", "node1"), 1);
+
+    assert_int_equal(pcmk__numeric_strcasecmp("node10", "remotenode9"), -1);
+    assert_int_equal(pcmk__numeric_strcasecmp("remotenode9", "node10"), 1);
+
+    /* Longer numbers sort higher than shorter numbers. */
+    assert_int_equal(pcmk__numeric_strcasecmp("node001", "node1"), 1);
+    assert_int_equal(pcmk__numeric_strcasecmp("node1", "node001"), -1);
+}
+
+static void
+middle_numbers(void **state)
+{
+    assert_int_equal(pcmk__numeric_strcasecmp("node1abc", "node1def"), -1);
+    assert_int_equal(pcmk__numeric_strcasecmp("node1def", "node1abc"), 1);
+
+    assert_int_equal(pcmk__numeric_strcasecmp("node1abc", "node2abc"), -1);
+    assert_int_equal(pcmk__numeric_strcasecmp("node2abc", "node1abc"), 1);
+}
+
+static void
+unequal_lengths(void **state)
+{
+    assert_int_equal(pcmk__numeric_strcasecmp("node-ab", "node-abc"), -1);
+    assert_int_equal(pcmk__numeric_strcasecmp("node-abc", "node-ab"), 1);
+
+    assert_int_equal(pcmk__numeric_strcasecmp("node1ab", "node1abc"), -1);
+    assert_int_equal(pcmk__numeric_strcasecmp("node1abc", "node1ab"), 1);
+}
+
+int
+main(int argc, char **argv)
+{
+    const struct CMUnitTest tests[] = {
+        cmocka_unit_test(no_numbers),
+        cmocka_unit_test(trailing_numbers),
+        cmocka_unit_test(middle_numbers),
+        cmocka_unit_test(unequal_lengths),
+    };
+
+    cmocka_set_message_output(CM_OUTPUT_TAP);
+    return cmocka_run_group_tests(tests, NULL, NULL);
+}