diff --git a/test/hash.cpp b/test/hash.cpp
new file mode 100644
index 0000000..23e0e26
--- /dev/null
+++ b/test/hash.cpp
@@ -0,0 +1,17 @@
+#include <stdplus/hash.hpp>
+
+#include <string>
+
+#include <gtest/gtest.h>
+
+namespace stdplus
+{
+
+TEST(HashMulti, Basic)
+{
+    EXPECT_EQ(0, hashMulti());
+    EXPECT_EQ(2654435834, hashMulti(1, 2));
+    hashMulti(1, std::string("bacon"), nullptr);
+}
+
+} // namespace stdplus