diff --git a/src/testlib/qtestcase.cpp b/src/testlib/qtestcase.cpp
index 6634597c5ee..4668c26934f 100644
--- a/src/testlib/qtestcase.cpp
+++ b/src/testlib/qtestcase.cpp
@@ -3337,6 +3337,8 @@ TO_STRING_IMPL(quint64, %llu)
 #endif
 TO_STRING_IMPL(bool, %d)
 TO_STRING_IMPL(char, %c)
+TO_STRING_IMPL(signed char, %hhd)
+TO_STRING_IMPL(unsigned char, %hhu)
 TO_STRING_IMPL(float, %g)
 TO_STRING_IMPL(double, %lg)
 
diff --git a/src/testlib/qtestcase.h b/src/testlib/qtestcase.h
index 9b0af186bc7..9f3c461cf06 100644
--- a/src/testlib/qtestcase.h
+++ b/src/testlib/qtestcase.h
@@ -340,6 +340,8 @@ namespace QTest
     QTEST_COMPARE_DECL(float)
     QTEST_COMPARE_DECL(double)
     QTEST_COMPARE_DECL(char)
+    QTEST_COMPARE_DECL(signed char)
+    QTEST_COMPARE_DECL(unsigned char)
     QTEST_COMPARE_DECL(bool)
 #endif