diff --git a/.cargo/config.toml b/.cargo/config.toml
index 59431ee..6736d47 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -1,5 +1,5 @@
 [alias]
- coverage = "tarpaulin --out Html --skip-clean"
+coverage = "tarpaulin --out Html --skip-clean"
 
 [build]
-rustc-wrapper = "sccache"
+# rustc-wrapper = "sccache"
diff --git a/emma/src/chip8/video.rs b/emma/src/chip8/video.rs
index 70ef5af..216d48a 100644
--- a/emma/src/chip8/video.rs
+++ b/emma/src/chip8/video.rs
@@ -251,6 +251,17 @@ mod test {
         }
 
         let test_offset = (x_offset * 64 + y_offset) as u16;
+        println!("TEST OFFSET = {test_offset}");
+        assert!(!v.peek(test_offset));
+        assert!(!v.peek(test_offset + 1));
+        assert!(!v.peek(test_offset + 2));
+        assert!(!v.peek(test_offset + 3));
+        assert!(!v.peek(test_offset + 4));
+        assert!(!v.peek(test_offset + 5));
+        assert!(!v.peek(test_offset + 6));
+        assert!(!v.peek(test_offset + 7));
+
+        let test_offset= test_offset + 0x40;
         assert!(v.peek(test_offset));
         assert!(v.peek(test_offset + 1));
         assert!(v.peek(test_offset + 2));
@@ -260,6 +271,7 @@ mod test {
         assert!(v.peek(test_offset + 6));
         assert!(v.peek(test_offset + 7));
 
+
     }
 
     #[test]