diff --git a/tracetools_test/test/test_utils.cpp b/tracetools_test/test/test_utils.cpp
index 0bba91a..2923a97 100644
--- a/tracetools_test/test/test_utils.cpp
+++ b/tracetools_test/test/test_utils.cpp
@@ -46,6 +46,13 @@ TEST(TestUtils, valid_symbol_funcptr) {
     "invalid symbol";
 }
 
+/*
+   Testing _get_symbol_funcptr from a null pointer.
+ */
+TEST(TestUtils, invalid_get_symbol_funcptr) {
+  EXPECT_STREQ(_get_symbol_funcptr(nullptr), SYMBOL_UNKNOWN);
+}
+
 /*
    Testing symbol resolution for std::function object created from a lambda.
  */