diff --git a/test/testcharvar.cpp b/test/testcharvar.cpp
index 6fb3c2adc..9dc31d202 100644
--- a/test/testcharvar.cpp
+++ b/test/testcharvar.cpp
@@ -77,6 +77,14 @@ private:
               "}");
         ASSERT_EQUALS("[test.cpp:5]: (warning) Signed 'char' type used as array index.\n", errout.str());
 
+        check("int buf[256];\n"
+              "void foo()\n"
+              "{\n"
+              "    signed char ch = 0;\n"
+              "    buf[ch] = 0;\n"
+              "}");
+        ASSERT_EQUALS("", errout.str());
+
         check("int buf[256];\n"
               "void foo(signed char ch)\n"
               "{\n"