diff --git a/src/snapshot_middleware/csv.rs b/src/snapshot_middleware/csv.rs
index 28876634..0cf16cfc 100644
--- a/src/snapshot_middleware/csv.rs
+++ b/src/snapshot_middleware/csv.rs
@@ -20,7 +20,7 @@ pub struct SnapshotCsv;
 
 impl SnapshotMiddleware for SnapshotCsv {
     fn from_imfs<F: ImfsFetcher>(
-        _context: &InstanceSnapshotContext,
+        _context: &mut InstanceSnapshotContext,
         imfs: &mut Imfs<F>,
         entry: &ImfsEntry,
     ) -> SnapshotInstanceResult<'static> {
@@ -162,7 +162,7 @@ Ack,Ack!,,An exclamation of despair,¡Ay!"#,
 
         let entry = imfs.get("/foo.csv").unwrap();
         let instance_snapshot =
-            SnapshotCsv::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotCsv::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .unwrap()
                 .unwrap();
 
@@ -184,7 +184,7 @@ Ack,Ack!,,An exclamation of despair,¡Ay!"#,
 
         let entry = imfs.get("/foo.csv").unwrap();
         let instance_snapshot =
-            SnapshotCsv::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotCsv::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .unwrap()
                 .unwrap();
 
diff --git a/src/snapshot_middleware/dir.rs b/src/snapshot_middleware/dir.rs
index ba499d26..1c36dc6f 100644
--- a/src/snapshot_middleware/dir.rs
+++ b/src/snapshot_middleware/dir.rs
@@ -18,7 +18,7 @@ pub struct SnapshotDir;
 
 impl SnapshotMiddleware for SnapshotDir {
     fn from_imfs<F: ImfsFetcher>(
-        _context: &InstanceSnapshotContext,
+        _context: &mut InstanceSnapshotContext,
         imfs: &mut Imfs<F>,
         entry: &ImfsEntry,
     ) -> SnapshotInstanceResult<'static> {
@@ -97,7 +97,7 @@ mod test {
 
         let entry = imfs.get("/foo").unwrap();
         let instance_snapshot =
-            SnapshotDir::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotDir::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .unwrap()
                 .unwrap();
 
@@ -115,7 +115,7 @@ mod test {
 
         let entry = imfs.get("/foo").unwrap();
         let instance_snapshot =
-            SnapshotDir::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotDir::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .unwrap()
                 .unwrap();
 
diff --git a/src/snapshot_middleware/json_model.rs b/src/snapshot_middleware/json_model.rs
index 23631439..accec10f 100644
--- a/src/snapshot_middleware/json_model.rs
+++ b/src/snapshot_middleware/json_model.rs
@@ -19,7 +19,7 @@ pub struct SnapshotJsonModel;
 
 impl SnapshotMiddleware for SnapshotJsonModel {
     fn from_imfs<F: ImfsFetcher>(
-        _context: &InstanceSnapshotContext,
+        _context: &mut InstanceSnapshotContext,
         imfs: &mut Imfs<F>,
         entry: &ImfsEntry,
     ) -> SnapshotInstanceResult<'static> {
@@ -163,10 +163,13 @@ mod test {
         imfs.debug_load_snapshot("/foo.model.json", file);
 
         let entry = imfs.get("/foo.model.json").unwrap();
-        let instance_snapshot =
-            SnapshotJsonModel::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
-                .unwrap()
-                .unwrap();
+        let instance_snapshot = SnapshotJsonModel::from_imfs(
+            &mut InstanceSnapshotContext::default(),
+            &mut imfs,
+            &entry,
+        )
+        .unwrap()
+        .unwrap();
 
         assert_yaml_snapshot!(instance_snapshot);
     }
diff --git a/src/snapshot_middleware/lua.rs b/src/snapshot_middleware/lua.rs
index fc7da815..13df304f 100644
--- a/src/snapshot_middleware/lua.rs
+++ b/src/snapshot_middleware/lua.rs
@@ -20,7 +20,7 @@ pub struct SnapshotLua;
 
 impl SnapshotMiddleware for SnapshotLua {
     fn from_imfs<F: ImfsFetcher>(
-        context: &InstanceSnapshotContext,
+        context: &mut InstanceSnapshotContext,
         imfs: &mut Imfs<F>,
         entry: &ImfsEntry,
     ) -> SnapshotInstanceResult<'static> {
@@ -116,7 +116,7 @@ fn snapshot_lua_file<F: ImfsFetcher>(
 /// Scripts named `init.lua`, `init.server.lua`, or `init.client.lua` usurp
 /// their parents, which acts similarly to `__init__.py` from the Python world.
 fn snapshot_init<F: ImfsFetcher>(
-    context: &InstanceSnapshotContext,
+    context: &mut InstanceSnapshotContext,
     imfs: &mut Imfs<F>,
     folder_entry: &ImfsEntry,
     init_name: &str,
@@ -156,7 +156,7 @@ mod test {
 
         let entry = imfs.get("/foo.lua").unwrap();
         let instance_snapshot =
-            SnapshotLua::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotLua::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .unwrap()
                 .unwrap();
 
@@ -172,7 +172,7 @@ mod test {
 
         let entry = imfs.get("/foo.server.lua").unwrap();
         let instance_snapshot =
-            SnapshotLua::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotLua::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .unwrap()
                 .unwrap();
 
@@ -188,7 +188,7 @@ mod test {
 
         let entry = imfs.get("/foo.client.lua").unwrap();
         let instance_snapshot =
-            SnapshotLua::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotLua::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .unwrap()
                 .unwrap();
 
@@ -212,7 +212,7 @@ mod test {
 
         let entry = imfs.get("/foo.lua").unwrap();
         let instance_snapshot =
-            SnapshotLua::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotLua::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .unwrap()
                 .unwrap();
 
@@ -236,7 +236,7 @@ mod test {
 
         let entry = imfs.get("/foo.server.lua").unwrap();
         let instance_snapshot =
-            SnapshotLua::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotLua::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .unwrap()
                 .unwrap();
 
@@ -262,7 +262,7 @@ mod test {
 
         let entry = imfs.get("/bar.server.lua").unwrap();
         let instance_snapshot =
-            SnapshotLua::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotLua::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .unwrap()
                 .unwrap();
 
diff --git a/src/snapshot_middleware/middleware.rs b/src/snapshot_middleware/middleware.rs
index 5b4d96c8..08c24df6 100644
--- a/src/snapshot_middleware/middleware.rs
+++ b/src/snapshot_middleware/middleware.rs
@@ -14,7 +14,7 @@ pub type SnapshotFileResult = Option<(String, ImfsSnapshot)>;
 
 pub trait SnapshotMiddleware {
     fn from_imfs<F: ImfsFetcher>(
-        context: &InstanceSnapshotContext,
+        context: &mut InstanceSnapshotContext,
         imfs: &mut Imfs<F>,
         entry: &ImfsEntry,
     ) -> SnapshotInstanceResult<'static>;
diff --git a/src/snapshot_middleware/mod.rs b/src/snapshot_middleware/mod.rs
index dae68d5a..26968482 100644
--- a/src/snapshot_middleware/mod.rs
+++ b/src/snapshot_middleware/mod.rs
@@ -44,12 +44,12 @@ macro_rules! middlewares {
             imfs: &mut Imfs<F>,
             entry: &ImfsEntry,
         ) -> SnapshotInstanceResult<'static> {
-            let context = InstanceSnapshotContext::default();
+            let mut context = InstanceSnapshotContext::default();
 
             $(
                 log::trace!("trying middleware {} on {}", stringify!($middleware), entry.path().display());
 
-                if let Some(snapshot) = $middleware::from_imfs(&context, imfs, entry)? {
+                if let Some(snapshot) = $middleware::from_imfs(&mut context, imfs, entry)? {
                     log::trace!("middleware {} success on {}", stringify!($middleware), entry.path().display());
                     return Ok(Some(snapshot));
                 }
diff --git a/src/snapshot_middleware/project.rs b/src/snapshot_middleware/project.rs
index 7266c398..d1e0d9f4 100644
--- a/src/snapshot_middleware/project.rs
+++ b/src/snapshot_middleware/project.rs
@@ -22,7 +22,7 @@ pub struct SnapshotProject;
 
 impl SnapshotMiddleware for SnapshotProject {
     fn from_imfs<F: ImfsFetcher>(
-        context: &InstanceSnapshotContext,
+        context: &mut InstanceSnapshotContext,
         imfs: &mut Imfs<F>,
         entry: &ImfsEntry,
     ) -> SnapshotInstanceResult<'static> {
@@ -212,7 +212,7 @@ mod test {
 
         let entry = imfs.get("/foo").unwrap();
         let instance_snapshot =
-            SnapshotProject::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotProject::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .expect("snapshot error")
                 .expect("snapshot returned no instances");
 
@@ -239,7 +239,7 @@ mod test {
 
         let entry = imfs.get("/foo/hello.project.json").unwrap();
         let instance_snapshot =
-            SnapshotProject::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotProject::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .expect("snapshot error")
                 .expect("snapshot returned no instances");
 
@@ -272,7 +272,7 @@ mod test {
 
         let entry = imfs.get("/foo").unwrap();
         let instance_snapshot =
-            SnapshotProject::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotProject::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .expect("snapshot error")
                 .expect("snapshot returned no instances");
 
@@ -302,7 +302,7 @@ mod test {
 
         let entry = imfs.get("/foo").unwrap();
         let instance_snapshot =
-            SnapshotProject::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotProject::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .expect("snapshot error")
                 .expect("snapshot returned no instances");
 
@@ -333,7 +333,7 @@ mod test {
 
         let entry = imfs.get("/foo").unwrap();
         let instance_snapshot =
-            SnapshotProject::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotProject::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .expect("snapshot error")
                 .expect("snapshot returned no instances");
 
@@ -361,7 +361,7 @@ mod test {
 
         let entry = imfs.get("/foo").unwrap();
         let instance_snapshot =
-            SnapshotProject::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotProject::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .expect("snapshot error")
                 .expect("snapshot returned no instances");
 
@@ -396,7 +396,7 @@ mod test {
 
         let entry = imfs.get("/foo").unwrap();
         let instance_snapshot =
-            SnapshotProject::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotProject::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .expect("snapshot error")
                 .expect("snapshot returned no instances");
 
@@ -435,7 +435,7 @@ mod test {
 
         let entry = imfs.get("/foo").unwrap();
         let instance_snapshot =
-            SnapshotProject::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotProject::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .expect("snapshot error")
                 .expect("snapshot returned no instances");
 
@@ -479,7 +479,7 @@ mod test {
 
         let entry = imfs.get("/foo").unwrap();
         let instance_snapshot =
-            SnapshotProject::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotProject::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .expect("snapshot error")
                 .expect("snapshot returned no instances");
 
diff --git a/src/snapshot_middleware/rbxlx.rs b/src/snapshot_middleware/rbxlx.rs
index f5e610df..531ef4d8 100644
--- a/src/snapshot_middleware/rbxlx.rs
+++ b/src/snapshot_middleware/rbxlx.rs
@@ -15,7 +15,7 @@ pub struct SnapshotRbxlx;
 
 impl SnapshotMiddleware for SnapshotRbxlx {
     fn from_imfs<F: ImfsFetcher>(
-        _context: &InstanceSnapshotContext,
+        _context: &mut InstanceSnapshotContext,
         imfs: &mut Imfs<F>,
         entry: &ImfsEntry,
     ) -> SnapshotInstanceResult<'static> {
diff --git a/src/snapshot_middleware/rbxm.rs b/src/snapshot_middleware/rbxm.rs
index 2a1d910a..7d11751a 100644
--- a/src/snapshot_middleware/rbxm.rs
+++ b/src/snapshot_middleware/rbxm.rs
@@ -17,7 +17,7 @@ pub struct SnapshotRbxm;
 
 impl SnapshotMiddleware for SnapshotRbxm {
     fn from_imfs<F: ImfsFetcher>(
-        _context: &InstanceSnapshotContext,
+        _context: &mut InstanceSnapshotContext,
         imfs: &mut Imfs<F>,
         entry: &ImfsEntry,
     ) -> SnapshotInstanceResult<'static> {
@@ -71,7 +71,7 @@ mod test {
 
         let entry = imfs.get("/foo.rbxm").unwrap();
         let instance_snapshot =
-            SnapshotRbxm::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotRbxm::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .unwrap()
                 .unwrap();
 
diff --git a/src/snapshot_middleware/rbxmx.rs b/src/snapshot_middleware/rbxmx.rs
index 8e29cd9c..663c2f0d 100644
--- a/src/snapshot_middleware/rbxmx.rs
+++ b/src/snapshot_middleware/rbxmx.rs
@@ -15,7 +15,7 @@ pub struct SnapshotRbxmx;
 
 impl SnapshotMiddleware for SnapshotRbxmx {
     fn from_imfs<F: ImfsFetcher>(
-        _context: &InstanceSnapshotContext,
+        _context: &mut InstanceSnapshotContext,
         imfs: &mut Imfs<F>,
         entry: &ImfsEntry,
     ) -> SnapshotInstanceResult<'static> {
@@ -77,7 +77,7 @@ mod test {
 
         let entry = imfs.get("/foo.rbxmx").unwrap();
         let instance_snapshot =
-            SnapshotRbxmx::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotRbxmx::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .unwrap()
                 .unwrap();
 
diff --git a/src/snapshot_middleware/txt.rs b/src/snapshot_middleware/txt.rs
index 4d952041..11584d15 100644
--- a/src/snapshot_middleware/txt.rs
+++ b/src/snapshot_middleware/txt.rs
@@ -20,7 +20,7 @@ pub struct SnapshotTxt;
 
 impl SnapshotMiddleware for SnapshotTxt {
     fn from_imfs<F: ImfsFetcher>(
-        _context: &InstanceSnapshotContext,
+        _context: &mut InstanceSnapshotContext,
         imfs: &mut Imfs<F>,
         entry: &ImfsEntry,
     ) -> SnapshotInstanceResult<'static> {
@@ -117,7 +117,7 @@ mod test {
 
         let entry = imfs.get("/foo.txt").unwrap();
         let instance_snapshot =
-            SnapshotTxt::from_imfs(&InstanceSnapshotContext::default(), &mut imfs, &entry)
+            SnapshotTxt::from_imfs(&mut InstanceSnapshotContext::default(), &mut imfs, &entry)
                 .unwrap()
                 .unwrap();