diff --git a/src/mutations.rs b/src/mutations.rs
index 87ed510..8c14787 100644
--- a/src/mutations.rs
+++ b/src/mutations.rs
@@ -2,7 +2,7 @@ use serde::{Deserialize, Serialize};
 
 /// A single file change inferred from a sandbox diff: `hash_before` absent means the file
 /// was created, `hash_after` absent means it was deleted, both present means it was modified.
-#[derive(Debug, Clone, Serialize, Deserialize)]
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub struct FileMutation {
     pub file: String,
     pub hash_before: Option<String>,