diff --git a/tests/bats/Dockerfile b/tests/bats/Dockerfile
index 491b10f..d61c62d 100644
--- a/tests/bats/Dockerfile
+++ b/tests/bats/Dockerfile
@@ -5,6 +5,7 @@ RUN apk add --no-cache bash bats git openssl borgbackup
 COPY helpers/shells/ /test/scripts/
 COPY tests/bats/createRepo.bats /test/tests/createRepo.bats
 COPY tests/bats/deleteRepo.bats /test/tests/deleteRepo.bats
+COPY tests/bats/updateRepo.bats /test/tests/updateRepo.bats
 
 RUN chmod +x /test/scripts/*.sh
 
diff --git a/tests/bats/updateRepo.bats b/tests/bats/updateRepo.bats
new file mode 100644
index 0000000..908c70d
--- /dev/null
+++ b/tests/bats/updateRepo.bats
@@ -0,0 +1,84 @@
+#!/usr/bin/env bats
+
+setup() {
+  # Setup the environment for each test
+  export home="/tmp/borgwarehouse"
+  mkdir -p "${home}/repos"
+  mkdir -p "${home}/.ssh"
+  touch "${home}/.ssh/authorized_keys"
+  
+  # SSH keys samples for testing
+  export SSH_KEY_ED25519="ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICtujwncNGgdNxWOCQedMCnrhRZT4B7eUyyFJNryvQj9 publickey"
+  export SSH_KEY_RSA="ssh-rsa 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 publickey"
+}
+
+teardown() {
+  # Cleanup after each test
+  rm -rf /tmp/borgwarehouse
+}
+
+@test "Test updateRepo.sh with missing arguments" {
+  run bash /test/scripts/updateRepo.sh
+  [ "$status" -eq 1 ]
+  [ "$output" == "This shell takes 4 args: [repositoryName] [new SSH pub key] [quota] [Append only mode [true|false]]" ]
+}
+
+@test "Test updateRepo.sh with invalid SSH key format" {
+  run bash /test/scripts/updateRepo.sh "abcdef12" "invalid-key" 10 true
+  [ "$status" -eq 2 ]
+  [ "$output" == "Invalid public SSH KEY format. Provide a key in OpenSSH format (rsa, ed25519, ed25519-sk)" ]
+}
+
+@test "Test updateRepo.sh with repositoryName shorter than 8 characters" {
+  run bash /test/scripts/updateRepo.sh "1234567" "$SSH_KEY_ED25519" 10 true
+  [ "$status" -eq 3 ]
+  [ "$output" == "Invalid repository name. Must be an 8-character hex string." ]
+}
+
+@test "Test updateRepo.sh with repositoryName not matching hex format" {
+  run bash /test/scripts/updateRepo.sh "invalid" "$SSH_KEY_ED25519" 10 true
+  [ "$status" -eq 3 ]
+  [ "$output" == "Invalid repository name. Must be an 8-character hex string." ]
+}
+
+@test "Test updateRepo.sh when no matching repository name in authorized_keys" {
+  run bash /test/scripts/updateRepo.sh "abcdef12" "$SSH_KEY_ED25519" 10 true
+  [ "$status" -eq 4 ]
+  [ "$output" == "No line containing abcdef12 found in authorized_keys" ]
+}
+
+@test "Test updateRepo.sh when the new SSH key is already present for a different repository" {
+  # Add the new key to a different repository
+  echo "command=\"cd ${home}/repos;borg serve --restrict-to-path ${home}/repos/abcdef13 --storage-quota 10G\",restrict $SSH_KEY_ED25519" >> "${home}/.ssh/authorized_keys"
+
+  # Add an entry for the repository being updated
+  echo "command=\"cd ${home}/repos;borg serve --restrict-to-path ${home}/repos/abcdef12 --storage-quota 10G\",restrict $SSH_KEY_RSA" >> "${home}/.ssh/authorized_keys"
+  
+  run bash /test/scripts/updateRepo.sh "abcdef12" "$SSH_KEY_ED25519" 10 true
+  [ "$status" -eq 5 ]
+  [ "$output" == "This SSH pub key is already present in authorized_keys on a different line." ]
+}
+
+@test "Test updateRepo.sh with successful update and append-only enabled" {
+  # Add an entry for the repository being updated
+  echo "command=\"cd ${home}/repos;borg serve --restrict-to-path ${home}/repos/abcdef12 --storage-quota 10G\",restrict $SSH_KEY_RSA" >> "${home}/.ssh/authorized_keys"
+  
+  # Update the repository with a new SSH key and append-only mode
+  run bash /test/scripts/updateRepo.sh "abcdef12" "$SSH_KEY_ED25519" 20 true
+  [ "$status" -eq 0 ]
+  
+  # Check that the line was updated correctly in authorized_keys
+  grep -q "command=\"cd ${home}/repos;borg serve --append-only --restrict-to-path ${home}/repos/abcdef12 --storage-quota 20G\",restrict $SSH_KEY_ED25519" "${home}/.ssh/authorized_keys"
+}
+
+@test "Test updateRepo.sh with disabling append-only mode" {
+  # Add an entry for the repository being updated with append-only enabled
+  echo "command=\"cd ${home}/repos;borg serve --append-only --restrict-to-path ${home}/repos/abcdef12 --storage-quota 10G\",restrict $SSH_KEY_RSA" >> "${home}/.ssh/authorized_keys"
+  
+  # Update the repository with a new SSH key and disable append-only mode
+  run bash /test/scripts/updateRepo.sh "abcdef12" "$SSH_KEY_ED25519" 20 false
+  [ "$status" -eq 0 ]
+  
+  # Check that the append-only mode was removed
+  grep -q "command=\"cd ${home}/repos;borg serve --restrict-to-path ${home}/repos/abcdef12 --storage-quota 20G\",restrict $SSH_KEY_ED25519" "${home}/.ssh/authorized_keys"
+}