diff --git a/tests/test_ram.cpp b/tests/test_ram.cpp
new file mode 100644
index 0000000..73e1d33
--- /dev/null
+++ b/tests/test_ram.cpp
@@ -0,0 +1,32 @@
+#include "doctest.h"
+#include "memory/ram.h"
+
+TEST_SUITE_BEGIN("memory/ram");
+
+TEST_CASE("byte order for 16-byte write is correct")
+{
+  RAM r(0x10);
+  r.write16(0x0,0xAA55);
+  CHECK(r.read8(0x0) == 0x55);
+  CHECK(r.read8(0x1) == 0xAA);
+}
+
+TEST_CASE("byte order for 16-byte write is correct")
+{
+  RAM r(0x10);
+  r.write8(0x0, 0x55);
+  r.write8(0x1, 0xAA);
+
+  CHECK(r.read16(0x0) == 0xAA55);
+}
+
+TEST_CASE("can be read only")
+{
+  u8 data[1] = { 0x00 };
+  RAM r(data, 1, true);
+
+  r.write8(0,0x10);
+  CHECK(r.read8(0) == 0x00);
+}
+
+TEST_SUITE_END();