diff --git a/libcpuid/libcpuid_util.c b/libcpuid/libcpuid_util.c
index 57900f1..83bf1bd 100644
--- a/libcpuid/libcpuid_util.c
+++ b/libcpuid/libcpuid_util.c
@@ -58,6 +58,8 @@ libcpuid_warn_fn_t _warn_fun = default_warn;
 #endif
 void warnf(const char* format, ...)
 {
+	if (getenv("LIBCPUID_NO_WARN"))
+		return;
 	char buff[1024];
 	va_list va;
 	if (!_warn_fun) return;
diff --git a/tests/run_tests.py b/tests/run_tests.py
index 0b74048..5ce6915 100755
--- a/tests/run_tests.py
+++ b/tests/run_tests.py
@@ -5,6 +5,7 @@ import os, sys, re, random
 
 
 ### Constants:
+os.environ["LIBCPUID_NO_WARN"] = "1"
 delimiter = "-" * 80
 fields_x86 = [ "architecture", "feature-level", "purpose", "family", "model", "stepping",
 	   "extfamily", "extmodel", "cores", "logical",