diff --git a/.github/workflows/slow_tests.yml b/.github/workflows/slow_tests.yml
index 6d18b22f..16dcfe45 100644
--- a/.github/workflows/slow_tests.yml
+++ b/.github/workflows/slow_tests.yml
@@ -1,6 +1,8 @@
 name: Slow Tests
 
 env:
+  ANDROID_API_LEVEL: 21
+  ANDROID_NDK_VERSION: 27.0.12077973
   LIBSIGNAL_TESTING_ENCLAVE_SECRET: ${{secrets.SVR_ENCLAVE_SECRET}}
   LIBSIGNAL_TESTING_CDSI_ENCLAVE_SECRET: ${{secrets.CDSI_ENCLAVE_SECRET}}
   RUST_LOG: debug
@@ -163,7 +165,8 @@ jobs:
         uses: reactivecircus/android-emulator-runner@6b0df4b0efb23bb0ec63d881db79aefbc976e4b2 # v2.30.1
         with:
           arch: ${{ matrix.arch }}
-          api-level: 21
+          api-level: ${{ env.ANDROID_API_LEVEL }}
+          ndk: ${{ env.ANDROID_NDK_VERSION }}
           force-avd-creation: false
           emulator-options: -no-window -noaudio -no-boot-anim
           script: echo "Generated AVD snapshot for caching."
@@ -172,7 +175,8 @@ jobs:
         uses: reactivecircus/android-emulator-runner@6b0df4b0efb23bb0ec63d881db79aefbc976e4b2 # v2.30.1
         with:
           arch: ${{ matrix.arch }}
-          api-level: 21
+          api-level: ${{ env.ANDROID_API_LEVEL }}
+          ndk: ${{ env.ANDROID_NDK_VERSION }}
           force-avd-creation: false
           emulator-options: -no-snapshot-save -no-window -noaudio -no-boot-anim
           script: ./gradlew android:connectedCheck -x makeJniLibrariesDesktop -x android:makeJniLibraries