diff --git a/audit/audit.asm b/audit/audit.asm
index 4946d8c..fd70cc5 100644
--- a/audit/audit.asm
+++ b/audit/audit.asm
@@ -8,7 +8,7 @@
 
 	;; Major version number
 	VER_MAJOR = 1
-	VER_MINOR = 5
+	VER_MINOR = 6
 
 	;; Zero-page locations.
 	SCRATCH = $1
diff --git a/audit/audit.dsk b/audit/audit.dsk
index 2f6c106..afe6131 100644
Binary files a/audit/audit.dsk and b/audit/audit.dsk differ
diff --git a/audit/langcard.asm b/audit/langcard.asm
index 72f5c9a..07089b4 100644
--- a/audit/langcard.asm
+++ b/audit/langcard.asm
@@ -280,10 +280,17 @@ LANGCARDTESTS_NO_CHECK:
 	!byte $53, $60, $11, $54, $61		;
 						;
 	lda $C081				; Read $C081, $C081, write $C081 (read ROM, write RAM bank bank 2)
-	lda $C081				;
+	lda $C081				; See https://github.com/zellyn/a2audit/issues/3
 	sta $C081				;
 	jsr .test				;
-	!byte $53, $60, $11, $54, $61		; See https://github.com/zellyn/a2audit/issues/3
+	!byte $53, $60, $11, $54, $61		;
+						;
+	lda $C081				; Read $C081, $C081; write $C081, $C081
+	lda $C081				; See https://github.com/zellyn/a2audit/issues/4
+	sta $C081				;
+	sta $C081				;
+	jsr .test				;
+	!byte $53, $60, $11, $54, $61		;
 						;
 	lda $C08B				; Read $C08B (read RAM bank 1, no write)
 	jsr .test				;
@@ -321,8 +328,8 @@ LANGCARDTESTS_NO_CHECK:
 	!byte $11, $33, $11, $22, $33		;
 						;
 	clc					; Read $C083, $C083 (read/write RAM bank 2)
-	ldx #0					;
-	inc $C083,x				; Uses "6502 false read"
+	ldx #0					; Uses "6502 false read"
+	inc $C083,x				;
 	jsr .test				;
 	!byte $23, $34, $11, $23, $34		;
 						;