diff --git a/dos33_boot_test.go b/dos33_boot_test.go
index 11c0bc9..f8f19e0 100644
--- a/dos33_boot_test.go
+++ b/dos33_boot_test.go
@@ -12,14 +12,14 @@ import (
 	"time"
 )
 
-const diskImage = "dos33_disk.dsk"
+const dosDiskImage = "dos33.dsk"
 
 func TestDOS33Boot(t *testing.T) {
 	cpu.InitInstructionDecoder()
 	mmu.InitRAM()
 	mmu.InitApple2eROM()
 	mmu.InitIO()
-	mmu.ReadDiskImage(diskImage)
+	mmu.ReadDiskImage(dosDiskImage)
 	cpu.Init()
 	keyboard.Init()
 	video.Init()
diff --git a/rwts_write_test.go b/rwts_write_test.go
index 903a4af..afc1e52 100644
--- a/rwts_write_test.go
+++ b/rwts_write_test.go
@@ -11,7 +11,7 @@ import (
 	"testing"
 )
 
-const diskImage = "dos33_disk.dsk"
+const rwtsDosDiskImage = "dos33.dsk"
 
 func writeBytes(address int, data []uint8) {
 	for i := 0; i < len(data); i++ {
@@ -25,7 +25,7 @@ func TestDos33RtsWriteRead(t *testing.T) {
 	mmu.InitRAM()
 	mmu.InitApple2eROM()
 	mmu.InitIO()
-	mmu.ReadDiskImage(diskImage)
+	mmu.ReadDiskImage(rwtsDosDiskImage)
 	cpu.Init()
 	keyboard.Init()
 	video.Init()