diff --git a/core/dr-gpu/src/adjust.rs b/core/dr-gpu/src/adjust.rs
index d842a2d..becc922 100644
--- a/core/dr-gpu/src/adjust.rs
+++ b/core/dr-gpu/src/adjust.rs
@@ -1501,6 +1501,17 @@ mod tests {
             );
             fused_blocks += usize::from(point);
         }
+
+        // The count the loop above accumulated, plus framing — which emits a
+        // stage of its own rather than an operation block and is not in
+        // `descriptors`. Asserted as well as the per-operation exclusive-or
+        // because the two catch different faults: the XOR catches an operation
+        // in the wrong stage, this catches a block in the shader that nothing
+        // in the chain asked for.
+        assert_eq!(
+            shader.source.matches("---- ").count(),
+            fused_blocks + 1,
+            "the fused shader carries a block nothing in the chain asked for"
         );
         assert!(
             shader.source.contains("---- framing ----"),
diff --git a/core/dr-pipeline/src/lib.rs b/core/dr-pipeline/src/lib.rs
index be7f1bd..2c23fb1 100644
--- a/core/dr-pipeline/src/lib.rs
+++ b/core/dr-pipeline/src/lib.rs
@@ -148,16 +148,6 @@ mod tests {
             fused_blocks,
             "the fused shader carries a block nothing in the chain asked for"
         );
-
-        // And each neighbourhood operation is genuinely absent from the fused
-        // shader rather than merely uncounted — the arithmetic above would be
-        // satisfied just as well by two errors that cancelled.
-        for id in &neighbourhood {
-            assert!(
-                !shader.source.contains(&format!("---- {id} ----")),
-                "{id} reads its neighbours and cannot be a fused fragment"
-            );
-        }
     }
 
     #[test]