diff --git a/src/launchpad/artifacts/android/aab.py b/src/launchpad/artifacts/android/aab.py
index 097c2672..ec59c918 100644
--- a/src/launchpad/artifacts/android/aab.py
+++ b/src/launchpad/artifacts/android/aab.py
@@ -5,6 +5,7 @@
 import shutil
 import tempfile
 
+from functools import partial
 from pathlib import Path
 from typing import Callable
 
@@ -101,7 +102,7 @@ def get_primary_apks(self, device_spec: DeviceSpec = DeviceSpec()) -> list[APK]:
                         APK(
                             new_apk_path,
                             self.get_dex_mapping(),
-                            cleanup=lambda: shutil.rmtree(tmp_dir),
+                            cleanup=partial(shutil.rmtree, tmp_dir),
                         )
                     )
 
@@ -148,7 +149,8 @@ def get_dex_mapping(self) -> DexMapping | None:
         dex_mapping_file = dex_mapping_files[0]
         with open(dex_mapping_file, "rb") as f:
             dex_mapping_buffer = f.read()
-        return DexMapping(dex_mapping_buffer)
+        self._dex_mapping = DexMapping(dex_mapping_buffer)
+        return self._dex_mapping
 
     @sentry_sdk.trace
     def get_app_icon(self) -> bytes | None:
diff --git a/tests/unit/artifacts/android/test_aab.py b/tests/unit/artifacts/android/test_aab.py
index 18e3809e..0c768845 100644
--- a/tests/unit/artifacts/android/test_aab.py
+++ b/tests/unit/artifacts/android/test_aab.py
@@ -42,3 +42,9 @@ def test_get_app_icon_rejects_path_traversal(self, test_aab: AAB) -> None:
         with patch.object(test_aab, "get_manifest", return_value=malicious_manifest):
             with pytest.raises(UnsafePathError):
                 test_aab.get_app_icon()
+
+    def test_get_dex_mapping_caches_mapping(self, test_aab: AAB) -> None:
+        dex_mapping = test_aab.get_dex_mapping()
+
+        assert dex_mapping is not None
+        assert test_aab.get_dex_mapping() is dex_mapping