diff --git a/test/testio.cpp b/test/testio.cpp
index 35b9fe224..c60efdff9 100644
--- a/test/testio.cpp
+++ b/test/testio.cpp
@@ -1296,6 +1296,13 @@ private:
         TEST_SCANF_WARN_AKA("%zx", "size_t", "ssize_t", "signed long", "signed long long");
         TEST_SCANF_WARN_AKA("%zx", "size_t", "ptrdiff_t", "signed long", "signed long long");
 
+        TEST_SCANF_WARN("%zd", "ssize_t", "bool");
+        TEST_SCANF_WARN("%zd", "ssize_t", "signed short");
+        TEST_SCANF_WARN("%zd", "ssize_t", "void *");
+        //TEST_SCANF_WARN("%zd", "ssize_t", "size_t");
+        TEST_SCANF_NOWARN("%zd", "ssize_t", "ssize_t");
+        //TEST_SCANF_WARN_AKA("%zd", "ssize_t", "ptrdiff_t", "signed long", "signed long long");
+
         TEST_SCANF_WARN("%tu", "unsigned ptrdiff_t", "bool");
         TEST_SCANF_WARN("%tu", "unsigned ptrdiff_t", "char");
         TEST_SCANF_WARN("%tu", "unsigned ptrdiff_t", "signed char");