diff --git a/src/basic/generate-errno-list.sh b/src/basic/generate-errno-list.sh
index d2ce51e981d..f756b2e0208 100755
--- a/src/basic/generate-errno-list.sh
+++ b/src/basic/generate-errno-list.sh
@@ -3,5 +3,9 @@
 set -eu
 set -o pipefail
 
+# In kernel's arch/parisc/include/uapi/asm/errno.h, ECANCELLED and EREFUSED are defined as aliases of
+# ECANCELED and ECONNREFUSED, respectively. Let's drop them.
+
 ${1:?} -dM -include errno.h - </dev/null | \
+       grep -Ev '^#define[[:space:]]+(ECANCELLED|EREFUSED)' | \
        awk '/^#define[ \t]+E[^ _]+[ \t]+/ { print $2; }'
diff --git a/src/test/meson.build b/src/test/meson.build
index 71d2422caf0..9a1c481f226 100644
--- a/src/test/meson.build
+++ b/src/test/meson.build
@@ -574,6 +574,9 @@ tests += [
         [['src/test/test-arphrd-util.c',
           generated_gperf_headers]],
 
+        [['src/test/test-errno-list.c',
+          generated_gperf_headers]],
+
         [['src/test/test-ip-protocol-list.c',
           shared_generated_gperf_headers]],
 
diff --git a/src/test/test-errno-list.c b/src/test/test-errno-list.c
new file mode 100644
index 00000000000..6c8f384cab5
--- /dev/null
+++ b/src/test/test-errno-list.c
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+
+#include "errno-list.h"
+#include "errno-to-name.h"
+#include "macro.h"
+#include "string-util.h"
+#include "tests.h"
+#include "util.h"
+
+TEST(errno_list) {
+        for (size_t i = 0; i < ELEMENTSOF(errno_names); i++) {
+                if (errno_names[i]) {
+                        assert_se(streq(errno_to_name(i), errno_names[i]));
+                        assert_se(errno_from_name(errno_names[i]) == (int) i);
+                }
+        }
+
+#ifdef ECANCELLED
+        /* ECANCELLED is an alias of ECANCELED. */
+        assert_se(streq(errno_to_name(ECANCELLED), "ECANCELED"));
+#endif
+        assert_se(streq(errno_to_name(ECANCELED), "ECANCELED"));
+
+#ifdef EREFUSED
+        /* EREFUSED is an alias of ECONNREFUSED. */
+        assert_se(streq(errno_to_name(EREFUSED), "ECONNREFUSED"));
+#endif
+        assert_se(streq(errno_to_name(ECONNREFUSED), "ECONNREFUSED"));
+}
+
+DEFINE_TEST_MAIN(LOG_INFO);