diff --git a/test/test.t.c b/test/test.t.c
index acc5844..8d1286a 100644
--- a/test/test.t.c
+++ b/test/test.t.c
@@ -66,6 +66,15 @@
 
 
 
+/*
+ *      DESC_REGISTER_02 - description for sol_tsuite_register() unit test #2
+ */
+#define DESC_REGISTER_02 "sol_tsuite_register() should throw SOL_ERNO_PTR" \
+                         " when passed a null pointer for @tcase"
+
+
+
+
 /*
  *      tlog_dummy() - dummy test suite logging callback
  */
@@ -164,6 +173,29 @@ test_register_01(void)
 
 
 
+/*
+ *      test_register_02() - sol_tsuite_register() unit test #2
+ */
+static sol_erno
+test_register_02(void)
+{
+        auto sol_tsuite ts; /* dummy test suite */
+
+SOL_TRY:
+                /* sol_tsuite_register() should fail with SOL_ERNO_PTR */
+        sol_try (sol_tsuite_init2    (&ts, tlog_dummy));
+        sol_try (sol_tsuite_register (&ts, 0, "Dummy"));
+
+SOL_CATCH:
+                /* check test condition described by DESC_REGISTER_01 */
+        return SOL_ERNO_PTR == sol_erno_now ()
+               ? SOL_ERNO_NULL
+               : SOL_ERNO_TEST;
+}
+
+
+
+
 /*
  *      __sol_tsuite_test() - declared in sol/test/suite.h
  */
@@ -188,6 +220,7 @@ __sol_tsuite_test(sol_tlog *log,
         sol_try (sol_tsuite_register (ts, test_init2_01,    DESC_INIT2_01));
         sol_try (sol_tsuite_register (ts, test_init2_02,    DESC_INIT2_02));
         sol_try (sol_tsuite_register (ts, test_register_01, DESC_REGISTER_01));
+        sol_try (sol_tsuite_register (ts, test_register_02, DESC_REGISTER_02));
 
                 /* execute test cases */
         sol_try (sol_tsuite_exec (ts));