diff --git a/tests/Feature/ServerConnectionTimeoutApiTest.php b/tests/Feature/ServerConnectionTimeoutApiTest.php
new file mode 100644
index 000000000..287122523
--- /dev/null
+++ b/tests/Feature/ServerConnectionTimeoutApiTest.php
@@ -0,0 +1,74 @@
+<?php
+
+use App\Models\InstanceSettings;
+use App\Models\Server;
+use App\Models\Team;
+use App\Models\User;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+
+uses(RefreshDatabase::class);
+
+beforeEach(function () {
+    InstanceSettings::forceCreate(['id' => 0, 'is_api_enabled' => true]);
+
+    $this->team = Team::factory()->create();
+    $this->user = User::factory()->create();
+    $this->team->members()->attach($this->user->id, ['role' => 'owner']);
+    session(['currentTeam' => $this->team]);
+
+    $this->server = Server::factory()->create([
+        'team_id' => $this->team->id,
+    ]);
+
+    $newToken = $this->user->createToken('write-token', ['write']);
+    $newToken->accessToken->forceFill(['team_id' => $this->team->id])->save();
+    $this->token = $newToken->plainTextToken;
+});
+
+it('PATCH updates connection_timeout via API', function () {
+    $response = $this->withHeaders([
+        'Authorization' => 'Bearer '.$this->token,
+        'Content-Type' => 'application/json',
+    ])->patchJson('/api/v1/servers/'.$this->server->uuid, [
+        'connection_timeout' => 45,
+    ]);
+
+    $response->assertStatus(201);
+    expect($this->server->settings->fresh()->connection_timeout)->toBe(45);
+});
+
+it('PATCH rejects connection_timeout out of range', function () {
+    $response = $this->withHeaders([
+        'Authorization' => 'Bearer '.$this->token,
+        'Content-Type' => 'application/json',
+    ])->patchJson('/api/v1/servers/'.$this->server->uuid, [
+        'connection_timeout' => 0,
+    ]);
+
+    $response->assertStatus(422);
+    $response->assertJsonStructure(['errors' => ['connection_timeout']]);
+});
+
+it('PATCH rejects connection_timeout above max', function () {
+    $response = $this->withHeaders([
+        'Authorization' => 'Bearer '.$this->token,
+        'Content-Type' => 'application/json',
+    ])->patchJson('/api/v1/servers/'.$this->server->uuid, [
+        'connection_timeout' => 999,
+    ]);
+
+    $response->assertStatus(422);
+    $response->assertJsonStructure(['errors' => ['connection_timeout']]);
+});
+
+it('PATCH rejects non-integer connection_timeout', function () {
+    $response = $this->withHeaders([
+        'Authorization' => 'Bearer '.$this->token,
+        'Content-Type' => 'application/json',
+    ])->patchJson('/api/v1/servers/'.$this->server->uuid, [
+        'connection_timeout' => 'fast',
+    ]);
+
+    $response->assertStatus(422);
+    $response->assertJsonStructure(['errors' => ['connection_timeout']]);
+});