diff --git a/autotest/Bits/Bits.cpp b/autotest/Bits/Bits.cpp
new file mode 100644
index 000000000..cdeff97c7
--- /dev/null
+++ b/autotest/Bits/Bits.cpp
@@ -0,0 +1,24 @@
+#include <Core/Core.h>
+
+using namespace Upp;
+
+CONSOLE_APP_MAIN
+{
+	StdLogSetup(LOG_COUT|LOG_FILE);
+
+	Bits h;
+	Vector<bool> v;
+	
+	for(int i = 0; i < 100000; i++) {
+		int pos = Random(120000);
+		bool b = Random() & 1;
+		
+		v.At(pos, false) = b;
+		h.Set(pos, b);
+	}
+	
+	for(int i = 0; i < v.GetCount(); i++)
+		ASSERT(h.Get(i) == v[i]);
+	
+	LOG("--------- OK");
+}
diff --git a/autotest/Bits/Bits.upp b/autotest/Bits/Bits.upp
new file mode 100644
index 000000000..2c76592f1
--- /dev/null
+++ b/autotest/Bits/Bits.upp
@@ -0,0 +1,9 @@
+uses
+	Core;
+
+file
+	Bits.cpp;
+
+mainconfig
+	"" = "";
+