diff --git a/src/test/testdisplay.c b/src/test/testdisplay.c
index b5c6efc7..73577c4e 100644
--- a/src/test/testdisplay.c
+++ b/src/test/testdisplay.c
@@ -32,7 +32,7 @@ static void testdisplay_teardown(void *arg) {
 // Various Display Tests ...
 
 TEST test_boot_disk() {
-    test_setup_boot_disk("testdisplay1.nib.gz", 1);
+    test_setup_boot_disk("testdisplay1.dsk.gz", 1);
 
     BOOT_TO_DOS();
 
diff --git a/src/test/testvm.c b/src/test/testvm.c
index 8d8f5edc..ae1c2563 100644
--- a/src/test/testvm.c
+++ b/src/test/testvm.c
@@ -33,7 +33,7 @@ static void testvm_teardown(void *arg) {
 // VM TESTS ...
 
 TEST test_boot_disk() {
-    test_setup_boot_disk("testvm1.nib.gz", 1);
+    test_setup_boot_disk("testvm1.dsk.gz", 1);
 
     BOOT_TO_DOS();