diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 3976bbc..34cd27c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -52,12 +52,12 @@ jobs:
           mkdir tests tests/macOS_15_beta_1_OTA tests/iOS_18_beta_1_IPSW/
           # curl -L "https://updates.cdn-apple.com/2024SummerSeed/mobileassets/052-49061/CA7135A8-BAF6-4890-887C-35FB30C154D5/com_apple_MobileAsset_MacSoftwareUpdate/e2de87f20576b2bdc021d36f74a2f836cf42afe576178388dfd0cde875f4f979.aea" -o tests/macOS_15_beta_1_OTA/encrypted.aea
           aria2c -x 16 -s 16 -j 16 --file-allocation=none "https://updates.cdn-apple.com/2024SummerSeed/mobileassets/052-49061/CA7135A8-BAF6-4890-887C-35FB30C154D5/com_apple_MobileAsset_MacSoftwareUpdate/e2de87f20576b2bdc021d36f74a2f836cf42afe576178388dfd0cde875f4f979.aea" -o tests/macOS_15_beta_1_OTA/encrypted.aea
-          echo "$MACOS_OTA_TEST_KEY" > tests/macOS_15_beta_1_OTA/expected.txt
+          printf "$MACOS_OTA_TEST_KEY" > tests/macOS_15_beta_1_OTA/expected.txt
           # curl -L "https://updates.cdn-apple.com/2024SummerSeed/fullrestores/052-34764/D5D3D10C-E557-4A46-8EBD-290411A228AA/iPhone16,2_18.0_22A5282m_Restore.ipsw" -o tests/iPhone_15PM_18.0_22A5282m.ipsw
           aria2c -x 16 -s 16 -j 16 --file-allocation=none "https://updates.cdn-apple.com/2024SummerSeed/fullrestores/052-34764/D5D3D10C-E557-4A46-8EBD-290411A228AA/iPhone16,2_18.0_22A5282m_Restore.ipsw" -o tests/iPhone_15PM_18.0_22A5282m.ipsw
           unzip -p tests/iPhone_15PM_18.0_22A5282m.ipsw 090-29713-049.dmg.aea > tests/iOS_18_beta_1_IPSW/encrypted.aea
           rm tests/iPhone_15PM_18.0_22A5282m.ipsw
-          echo "$IOS_IPSW_TEST_KEY" > tests/iOS_18_beta_1_IPSW/expected.txt
+          printf "$IOS_IPSW_TEST_KEY" > tests/iOS_18_beta_1_IPSW/expected.txt
       - name: Run tests
         run: ./test_get_key.sh
 
@@ -81,11 +81,11 @@ jobs:
           # This file uses a compressed inner layer 
           # curl -L "https://updates.cdn-apple.com/2024/Iris/mobileassets/003-49672/A1233F60-3D17-491B-803A-DB26E20695AE/com_apple_MobileAsset_UAF_Siri_Understanding/6FF3BAF0-FBEF-4C01-BB0E-30CD61DAFCC4.aar" -o tests/small/encrypted.aea
           aria2c -x 16 -s 16 -j 16 --file-allocation=none "https://updates.cdn-apple.com/2024/Iris/mobileassets/003-49672/A1233F60-3D17-491B-803A-DB26E20695AE/com_apple_MobileAsset_UAF_Siri_Understanding/6FF3BAF0-FBEF-4C01-BB0E-30CD61DAFCC4.aar" -o tests/small/encrypted.aea
-          echo "$SMALL_TEST_KEY" > tests/small/key.txt
+          printf "$SMALL_TEST_KEY" > tests/small/key.txt
           # This file uses a raw inner layer
           # curl -L "https://updates.cdn-apple.com/2024SummerSeed/mobileassets/052-49061/CA7135A8-BAF6-4890-887C-35FB30C154D5/com_apple_MobileAsset_MacSoftwareUpdate/e2de87f20576b2bdc021d36f74a2f836cf42afe576178388dfd0cde875f4f979.aea" -o tests/large/encrypted.aea
           aria2c -x 16 -s 16 -j 16 --file-allocation=none "https://updates.cdn-apple.com/2024SummerSeed/mobileassets/052-49061/CA7135A8-BAF6-4890-887C-35FB30C154D5/com_apple_MobileAsset_MacSoftwareUpdate/e2de87f20576b2bdc021d36f74a2f836cf42afe576178388dfd0cde875f4f979.aea" -o tests/large/encrypted.aea
-          echo "$LARGE_TEST_KEY" > tests/large/key.txt
+          printf "$LARGE_TEST_KEY" > tests/large/key.txt
       - name: Build
         run: make
       - name: Run tests