diff --git a/modules/libcom/src/misc/epicsUnitTest.h b/modules/libcom/src/misc/epicsUnitTest.h
index 1f51eeeb2..61c1b8239 100644
--- a/modules/libcom/src/misc/epicsUnitTest.h
+++ b/modules/libcom/src/misc/epicsUnitTest.h
@@ -154,6 +154,10 @@ ok  3 - M_PI == 4.0*atan(1.0)
 #include "compilerDependencies.h"
 #include "libComAPI.h"
 
+/* Allow to test deprecated functions without warnings */
+#undef EPICS_DEPRECATED
+#define EPICS_DEPRECATED
+
 #ifdef __cplusplus
 extern "C" {
 #endif