diff --git a/lib/common/tests/utils/Makefile.am b/lib/common/tests/utils/Makefile.am
index a70f681754..50359a6e73 100644
--- a/lib/common/tests/utils/Makefile.am
+++ b/lib/common/tests/utils/Makefile.am
@@ -1,30 +1,32 @@
 #
 # 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.
 #
 
 include $(top_srcdir)/lib/common/mock.mk
 
 AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_builddir)/include -I$(top_srcdir)/lib/common
 LDADD = $(top_builddir)/lib/common/libcrmcommon.la -lcmocka
 
 include $(top_srcdir)/mk/tap.mk
 
 pcmk_hostname_test_LDADD = $(top_builddir)/lib/common/libcrmcommon_test.la -lcmocka
 pcmk_hostname_test_LDFLAGS = -Wl,--wrap=uname
 
 # Add "_test" to the end of all test program names to simplify .gitignore.
 check_PROGRAMS =	\
 	char2score_test \
 	pcmk_str_is_infinity_test		\
-	pcmk_str_is_minus_infinity_test
+	pcmk_str_is_minus_infinity_test \
+	score2char_stack_test 	\
+	score2char_test
 
 if WRAPPABLE_UNAME
 check_PROGRAMS += pcmk_hostname_test
 endif
 
 TESTS = $(check_PROGRAMS)
diff --git a/lib/common/tests/utils/score2char_stack_test.c b/lib/common/tests/utils/score2char_stack_test.c
new file mode 100644
index 0000000000..3cd69965fa
--- /dev/null
+++ b/lib/common/tests/utils/score2char_stack_test.c
@@ -0,0 +1,70 @@
+/*
+ * 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
+invalid_params(void **state)
+{
+    char *buf = malloc(9);
+
+    assert_null(score2char_stack(100, NULL, 9));
+    assert_null(score2char_stack(100, buf, 9));
+
+    free(buf);
+}
+
+static void
+outside_limits(void **state)
+{
+    char *buf = malloc(10);
+
+    buf = score2char_stack(CRM_SCORE_INFINITY * 2, buf, 10);
+    assert_string_equal(buf, CRM_INFINITY_S);
+
+    buf = score2char_stack(-CRM_SCORE_INFINITY * 2, buf, 10);
+    assert_string_equal(buf, CRM_MINUS_INFINITY_S);
+
+    free(buf);
+}
+
+static void
+inside_limits(void **state)
+{
+    char *buf = malloc(10);
+
+    buf = score2char_stack(0, buf, 10);
+    assert_string_equal(buf, "0");
+
+    buf = score2char_stack(1024, buf, 10);
+    assert_string_equal(buf, "1024");
+
+    buf = score2char_stack(-1024, buf, 10);
+    assert_string_equal(buf, "-1024");
+
+    free(buf);
+}
+
+int main(int argc, char **argv)
+{
+    const struct CMUnitTest tests[] = {
+        cmocka_unit_test(invalid_params),
+        cmocka_unit_test(outside_limits),
+        cmocka_unit_test(inside_limits),
+    };
+
+    cmocka_set_message_output(CM_OUTPUT_TAP);
+    return cmocka_run_group_tests(tests, NULL, NULL);
+}
diff --git a/lib/common/tests/utils/score2char_test.c b/lib/common/tests/utils/score2char_test.c
new file mode 100644
index 0000000000..98bbd8d1eb
--- /dev/null
+++ b/lib/common/tests/utils/score2char_test.c
@@ -0,0 +1,59 @@
+/*
+ * 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
+outside_limits(void **state)
+{
+    char *a = NULL;
+
+    a = score2char(CRM_SCORE_INFINITY * 2);
+    assert_string_equal(a, CRM_INFINITY_S);
+    free(a);
+
+    a = score2char(-CRM_SCORE_INFINITY * 2);
+    assert_string_equal(a, CRM_MINUS_INFINITY_S);
+    free(a);
+}
+
+static void
+inside_limits(void **state)
+{
+    char *a = NULL;
+
+    a = score2char(1024);
+    assert_string_equal(a, "1024");
+    free(a);
+
+    a = score2char(0);
+    assert_string_equal(a, "0");
+    free(a);
+
+    a = score2char(-1024);
+    assert_string_equal(a, "-1024");
+    free(a);
+}
+
+int main(int argc, char **argv)
+{
+    const struct CMUnitTest tests[] = {
+        cmocka_unit_test(outside_limits),
+        cmocka_unit_test(inside_limits),
+    };
+
+    cmocka_set_message_output(CM_OUTPUT_TAP);
+    return cmocka_run_group_tests(tests, NULL, NULL);
+}