diff --git a/test/implementations/encrypted/testutils/FakeAuthenticatedCipher.h b/test/implementations/encrypted/testutils/FakeAuthenticatedCipher.h
index d99ff86d..ad8232eb 100644
--- a/test/implementations/encrypted/testutils/FakeAuthenticatedCipher.h
+++ b/test/implementations/encrypted/testutils/FakeAuthenticatedCipher.h
@@ -7,7 +7,7 @@
 
 struct FakeKey {
   FakeKey(uint8_t value_):value(value_) {}
-  static FakeKey CreateRandom() {
+  static FakeKey CreateOSRandom() {
     return FakeKey(rand());
   }
   static FakeKey FromBinary(const void *data) {
diff --git a/test/interface/helpers/BlockStoreWithRandomKeysTest.cpp b/test/interface/helpers/BlockStoreWithRandomKeysTest.cpp
index fdcfada0..a6d0d53d 100644
--- a/test/interface/helpers/BlockStoreWithRandomKeysTest.cpp
+++ b/test/interface/helpers/BlockStoreWithRandomKeysTest.cpp
@@ -34,7 +34,7 @@ public:
 
 class BlockMock: public Block {
 public:
-  BlockMock(): Block(Key::CreateRandom()) {}
+  BlockMock(): Block(Key::CreateOSRandom()) {}
   MOCK_CONST_METHOD0(data, const void*());
   MOCK_METHOD3(write, void(const void*, uint64_t, uint64_t));
   MOCK_METHOD0(flush, void());