diff --git a/.gitignore b/.gitignore
index 9e83b48..027a8a3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,6 @@ apple2
 apple2.test
 apple2e.rom
 dos33.dsk
-prodos.dsk
+prodos19.dsk
 cpu.prof
 mem.prof
diff --git a/prodos_boot_test.go b/prodos_boot_test.go
index 3d0a756..bd018e6 100644
--- a/prodos_boot_test.go
+++ b/prodos_boot_test.go
@@ -14,7 +14,7 @@ import (
 	"github.com/freewilll/apple2/video"
 )
 
-const prodosDiskImage = "prodos.dsk"
+const prodosDiskImage = "prodos19.dsk"
 
 func TestProdosBoot(t *testing.T) {
 	cpu.InitInstructionDecoder()