diff --git a/test/nes-mmc3/banked-8-128k.c b/test/nes-mmc3/banked-8-128k.c
new file mode 100644
index 000000000..438236aad
--- /dev/null
+++ b/test/nes-mmc3/banked-8-128k.c
@@ -0,0 +1,42 @@
+#include <mapper.h>
+#include <stdlib.h>
+
+MAPPER_PRG_ROM_KB(128);
+
+volatile const char large_array[0x5000] = {
+    [0] = 1, [0x2000] = 2, [0x4000] = 3, [0x4fff] = 4};
+
+__attribute__((section(".prg_rom_0"))) volatile const char bank_0[0x2000] = {
+    [0] = 1, [0x1fff] = 2};
+__attribute__((section(".prg_rom_1"))) volatile const char bank_1[0x2000] = {
+    [0] = 3, [0x1fff] = 4};
+
+int main(void) {
+  if ((unsigned)large_array < 0xa000)
+    return EXIT_FAILURE;
+  if (large_array[0] != 1)
+    return EXIT_FAILURE;
+  if (large_array[0x2000] != 2)
+    return EXIT_FAILURE;
+  if (large_array[0x4000] != 3)
+    return EXIT_FAILURE;
+  if (large_array[0x4fff] != 4)
+    return EXIT_FAILURE;
+
+  if ((unsigned)bank_0 >= 0xa000)
+    return EXIT_FAILURE;
+  set_prg_8000(0);
+  if (bank_0[0] != 1)
+    return EXIT_FAILURE;
+  if (bank_0[0x1fff] != 2)
+    return EXIT_FAILURE;
+
+  if ((unsigned)bank_1 >= 0xa000)
+    return EXIT_FAILURE;
+  set_prg_bank(1, (unsigned)bank_1 >> 8);
+  if (bank_1[0] != 3)
+    return EXIT_FAILURE;
+  if (bank_1[0x1fff] != 4)
+    return EXIT_FAILURE;
+  return EXIT_SUCCESS;
+}
diff --git a/test/nes-mmc3/banked-8-256k.c b/test/nes-mmc3/banked-8-256k.c
new file mode 100644
index 000000000..e6adb36a0
--- /dev/null
+++ b/test/nes-mmc3/banked-8-256k.c
@@ -0,0 +1,42 @@
+#include <mapper.h>
+#include <stdlib.h>
+
+MAPPER_PRG_ROM_KB(256);
+
+volatile const char large_array[0x5000] = {
+    [0] = 1, [0x2000] = 2, [0x4000] = 3, [0x4fff] = 4};
+
+__attribute__((section(".prg_rom_0"))) volatile const char bank_0[0x2000] = {
+    [0] = 1, [0x1fff] = 2};
+__attribute__((section(".prg_rom_1"))) volatile const char bank_1[0x2000] = {
+    [0] = 3, [0x1fff] = 4};
+
+int main(void) {
+  if ((unsigned)large_array < 0xa000)
+    return EXIT_FAILURE;
+  if (large_array[0] != 1)
+    return EXIT_FAILURE;
+  if (large_array[0x2000] != 2)
+    return EXIT_FAILURE;
+  if (large_array[0x4000] != 3)
+    return EXIT_FAILURE;
+  if (large_array[0x4fff] != 4)
+    return EXIT_FAILURE;
+
+  if ((unsigned)bank_0 >= 0xa000)
+    return EXIT_FAILURE;
+  set_prg_8000(0);
+  if (bank_0[0] != 1)
+    return EXIT_FAILURE;
+  if (bank_0[0x1fff] != 2)
+    return EXIT_FAILURE;
+
+  if ((unsigned)bank_1 >= 0xa000)
+    return EXIT_FAILURE;
+  set_prg_bank(1, (unsigned)bank_1 >> 8);
+  if (bank_1[0] != 3)
+    return EXIT_FAILURE;
+  if (bank_1[0x1fff] != 4)
+    return EXIT_FAILURE;
+  return EXIT_SUCCESS;
+}
diff --git a/test/nes-mmc3/banked-8-64k.c b/test/nes-mmc3/banked-8-64k.c
new file mode 100644
index 000000000..269107ec7
--- /dev/null
+++ b/test/nes-mmc3/banked-8-64k.c
@@ -0,0 +1,42 @@
+#include <mapper.h>
+#include <stdlib.h>
+
+MAPPER_PRG_ROM_KB(64);
+
+volatile const char large_array[0x5000] = {
+    [0] = 1, [0x2000] = 2, [0x4000] = 3, [0x4fff] = 4};
+
+__attribute__((section(".prg_rom_0"))) volatile const char bank_0[0x2000] = {
+    [0] = 1, [0x1fff] = 2};
+__attribute__((section(".prg_rom_1"))) volatile const char bank_1[0x2000] = {
+    [0] = 3, [0x1fff] = 4};
+
+int main(void) {
+  if ((unsigned)large_array < 0xa000)
+    return EXIT_FAILURE;
+  if (large_array[0] != 1)
+    return EXIT_FAILURE;
+  if (large_array[0x2000] != 2)
+    return EXIT_FAILURE;
+  if (large_array[0x4000] != 3)
+    return EXIT_FAILURE;
+  if (large_array[0x4fff] != 4)
+    return EXIT_FAILURE;
+
+  if ((unsigned)bank_0 >= 0xa000)
+    return EXIT_FAILURE;
+  set_prg_8000(0);
+  if (bank_0[0] != 1)
+    return EXIT_FAILURE;
+  if (bank_0[0x1fff] != 2)
+    return EXIT_FAILURE;
+
+  if ((unsigned)bank_1 >= 0xa000)
+    return EXIT_FAILURE;
+  set_prg_bank(1, (unsigned)bank_1 >> 8);
+  if (bank_1[0] != 3)
+    return EXIT_FAILURE;
+  if (bank_1[0x1fff] != 4)
+    return EXIT_FAILURE;
+  return EXIT_SUCCESS;
+}