diff --git a/spec/integration/link_spec.cr b/spec/integration/link_spec.cr
index 878eb6f..a7551dc 100644
--- a/spec/integration/link_spec.cr
+++ b/spec/integration/link_spec.cr
@@ -1,9 +1,9 @@
 require "../spec_helper"
 require "../../app/models/*"
 
-API_KEY = Random::Secure.urlsafe_base64()
+API_KEY = Random::Secure.urlsafe_base64
 
-describe App::Controllers::Link do
+describe "App::Controllers::Link" do
   describe "Create" do
     it "should create link" do
       test_user = create_test_user()
@@ -36,7 +36,7 @@ describe App::Controllers::Link do
     it "should return 400 - invalid url" do
       test_user = create_test_user()
 
-      payload = {"url" => "test" }
+      payload = {"url" => "test"}
       post(
         "/api/links",
         headers: HTTP::Headers{"Content-Type" => "application/json", "X-Api-Key" => test_user.api_key.to_s},
diff --git a/spec/integration/ping_spec.cr b/spec/integration/ping_spec.cr
index 24f1d7e..c3434f1 100644
--- a/spec/integration/ping_spec.cr
+++ b/spec/integration/ping_spec.cr
@@ -1,6 +1,6 @@
 require "../spec_helper"
 
-describe App::Controllers::Ping do
+describe "App::Controllers::Ping" do
   it "should return pong" do
     get "/api/ping"
 
diff --git a/spec/services/cli_spec.cr b/spec/services/cli_spec.cr
new file mode 100644
index 0000000..26e0ffd
--- /dev/null
+++ b/spec/services/cli_spec.cr
@@ -0,0 +1,37 @@
+require "../spec_helper"
+require "../../app/services/cli"
+
+describe "App::Services::Cli" do
+  it "creates a new user" do
+    name = "testuser"
+    output = App::Services::Cli.create_user(name)
+
+    output.should contain "New user created: Name: testuser"
+  end
+
+  it "lists all users" do
+    App::Services::Cli.create_user("user1")
+    App::Services::Cli.create_user("user2")
+
+    output = App::Services::Cli.list_users
+
+    output.should contain "Users:"
+    output.should contain "Name: user1"
+    output.should contain "Name: user2"
+  end
+
+  it "deletes a user by ID" do
+    App::Services::Cli.create_user("user_to_delete")
+    user = App::Lib::Database.all(App::Models::User).first
+
+    output = App::Services::Cli.delete_user(user.id)
+
+    output.should contain "User with ID #{user.id} deleted successfully"
+  end
+
+  it "handles deletion of non-existent user" do
+    output = App::Services::Cli.delete_user("non-existent-id")
+
+    output.should contain "Failed to delete user"
+  end
+end