diff --git a/rslib/src/decks/name.rs b/rslib/src/decks/name.rs
index fa22f6a50..2f8a30086 100644
--- a/rslib/src/decks/name.rs
+++ b/rslib/src/decks/name.rs
@@ -82,10 +82,6 @@ impl NativeDeckName {
             .chain(self.components().skip(old_parent.components().count()))
             .join("\x1f")
     }
-
-    pub(crate) fn immediate_parent_name(&self) -> Option<&str> {
-        immediate_parent_name(self.as_native_str())
-    }
 }
 
 impl std::fmt::Display for NativeDeckName {
diff --git a/rslib/src/import_export/gather.rs b/rslib/src/import_export/gather.rs
index a7ee4e2d5..2634751b5 100644
--- a/rslib/src/import_export/gather.rs
+++ b/rslib/src/import_export/gather.rs
@@ -9,7 +9,7 @@ use std::{
 use itertools::Itertools;
 
 use crate::{
-    decks::NormalDeck,
+    decks::{immediate_parent_name, NormalDeck},
     io::filename_is_safe,
     latex::extract_latex,
     prelude::*,
@@ -172,23 +172,36 @@ impl Collection {
     }
 
     fn get_parent_decks(&mut self, decks: &[Deck]) -> Result<Vec<Deck>> {
-        let mut parent_names: HashSet<&str> =
-            decks.iter().map(|deck| deck.name.as_native_str()).collect();
+        let mut parent_names: HashSet<String> = decks
+            .iter()
+            .map(|deck| deck.name.as_native_str().to_owned())
+            .collect();
         let mut parents = Vec::new();
         for deck in decks {
-            while let Some(parent_name) = deck.name.immediate_parent_name() {
-                if parent_names.insert(parent_name) {
-                    parents.push(
-                        self.storage
-                            .get_deck_by_name(parent_name)?
-                            .ok_or(AnkiError::DatabaseCheckRequired)?,
-                    )
-                }
-            }
+            self.add_parent_decks(deck.name.as_native_str(), &mut parent_names, &mut parents)?;
         }
         Ok(parents)
     }
 
+    fn add_parent_decks(
+        &mut self,
+        name: &str,
+        parent_names: &mut HashSet<String>,
+        parents: &mut Vec<Deck>,
+    ) -> Result<()> {
+        if let Some(parent_name) = immediate_parent_name(name) {
+            if parent_names.insert(parent_name.to_owned()) {
+                parents.push(
+                    self.storage
+                        .get_deck_by_name(parent_name)?
+                        .ok_or(AnkiError::DatabaseCheckRequired)?,
+                );
+                self.add_parent_decks(parent_name, parent_names, parents)?;
+            }
+        }
+        Ok(())
+    }
+
     fn gather_notetypes(&mut self) -> Result<Vec<Notetype>> {
         self.storage.get_notetypes_for_search_notes()
     }
diff --git a/rslib/src/import_export/package/apkg/import/mod.rs b/rslib/src/import_export/package/apkg/import/mod.rs
index bb2cb2622..d63641fdb 100644
--- a/rslib/src/import_export/package/apkg/import/mod.rs
+++ b/rslib/src/import_export/package/apkg/import/mod.rs
@@ -67,10 +67,7 @@ impl ExchangeData {
         search: impl TryIntoSearch,
         with_scheduling: bool,
     ) -> Result<Self> {
-        let mut zip_file = archive.by_name(Meta::new_legacy().collection_filename())?;
-        let mut tempfile = NamedTempFile::new()?;
-        io::copy(&mut zip_file, &mut tempfile)?;
-
+        let tempfile = collection_to_tempfile(archive)?;
         let mut col = CollectionBuilder::new(tempfile.path()).build()?;
         col.maybe_upgrade_scheduler()?;
 
@@ -81,6 +78,13 @@ impl ExchangeData {
     }
 }
 
+fn collection_to_tempfile(archive: &mut ZipArchive<File>) -> Result<NamedTempFile> {
+    let mut zip_file = archive.by_name(Meta::new_legacy().collection_filename())?;
+    let mut tempfile = NamedTempFile::new()?;
+    io::copy(&mut zip_file, &mut tempfile)?;
+    Ok(tempfile)
+}
+
 impl Collection {
     fn maybe_upgrade_scheduler(&mut self) -> Result<()> {
         if self.scheduling_included()? {