diff --git a/Unix/tests/wsman/test_wsbuf.cpp b/Unix/tests/wsman/test_wsbuf.cpp
index 21f596b6e..47b06c0a1 100644
--- a/Unix/tests/wsman/test_wsbuf.cpp
+++ b/Unix/tests/wsman/test_wsbuf.cpp
@@ -1773,5 +1773,25 @@ NitsTest(TestShellSignalForCommandRequest)
 }
 NitsEndTest
 
+NitsTestWithSetup(TestBigString, TestWsbufSetup)
+{
+    String result;
+
+    if(!TEST_ASSERT (MI_RESULT_OK == WSBuf_Init(&s_buf, 10)))
+        NitsReturn;
+
+    {
+        result += TEST_STR_ENCODED;
+        std::string str = string(10000 * 1024, '.');
+        char *cstr = new char[str.length() + 1];
+        strcpy(cstr, str.c_str());
+        TEST_ASSERT (MI_RESULT_FAILED == WSBuf_AddString(&s_buf, cstr) );
+        delete [] cstr;
+    }
+
+    TEST_ASSERT (MI_RESULT_OK == WSBuf_Destroy(&s_buf));
+}
+NitsEndTest
+
 #endif