If there happens to be a user with uid 890, one of the tests fails.

adduser --uid 890 user890

The log output looks like:

./auparse_test > auparse_test.cur
diff -u ../../../../auparse/test/auparse_test.ref auparse_test.cur
...
@@ -113,14 +113,14 @@
         ppid=2013 (2013)
         pid=13010 (13010)
         auid=4294967295 (unset)
-        uid=890 (unknown(890))
-        gid=890 (unknown(890))
...
+        uid=890 (user890)
+        gid=890 (user890)
...
Makefile:610: recipe for target 'check' failed