diff --git a/lib/common/tests/utils/Makefile.am b/lib/common/tests/utils/Makefile.am
index b264a9a1e1..610254ef65 100644
--- a/lib/common/tests/utils/Makefile.am
+++ b/lib/common/tests/utils/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		\
 	      -I$(top_srcdir)/lib/common
 LDADD = $(top_builddir)/lib/common/libcrmcommon_test.la \
 	-lcmocka
 AM_CFLAGS = -DPCMK__UNIT_TESTING
 AM_LDFLAGS = $(LDFLAGS_WRAP)
 
 include $(top_srcdir)/mk/tap.mk
 
 # Add "_test" to the end of all test program names to simplify .gitignore.
 check_PROGRAMS =				\
 	compare_version_test			\
 	crm_meta_name_test			\
 	crm_meta_value_test			\
 	crm_user_lookup_test			\
 	pcmk_daemon_user_test			\
 	pcmk_str_is_infinity_test		\
-	pcmk_str_is_minus_infinity_test
+	pcmk_str_is_minus_infinity_test \
+	pcmk__getpid_s_test
 
 if WRAPPABLE_UNAME
 check_PROGRAMS += pcmk_hostname_test
 endif
 
 TESTS = $(check_PROGRAMS)
diff --git a/lib/common/tests/utils/pcmk__getpid_s_test.c b/lib/common/tests/utils/pcmk__getpid_s_test.c
new file mode 100644
index 0000000000..2015401e0f
--- /dev/null
+++ b/lib/common/tests/utils/pcmk__getpid_s_test.c
@@ -0,0 +1,46 @@
+/*
+ * 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 <crm/common/unittest_internal.h>
+
+#include "mock_private.h"
+
+#include <sys/types.h>
+#include <unistd.h>
+
+static void
+pcmk__getpid_s_test(void **state)
+{
+    char *retval;
+
+    // Set getpid() return value
+    pcmk__mock_getpid = true;
+    will_return(__wrap_getpid, 1234);
+
+    retval = pcmk__getpid_s();
+    assert_non_null(retval);
+    assert_string_equal("1234", retval);
+
+    free(retval);
+
+    pcmk__mock_getpid = false;
+}
+
+int
+main(int argc, char **argv)
+{
+    const struct CMUnitTest tests[] = {
+        cmocka_unit_test(pcmk__getpid_s_test),
+    };
+
+    cmocka_set_message_output(CM_OUTPUT_TAP);
+    return cmocka_run_group_tests(tests, NULL, NULL);
+}