diff --git a/OpenVPN Adapter Tests/OpenVPNAdapterTests.swift b/OpenVPN Adapter Tests/OpenVPNAdapterTests.swift
index 9ee9533..537c8c3 100644
--- a/OpenVPN Adapter Tests/OpenVPNAdapterTests.swift	
+++ b/OpenVPN Adapter Tests/OpenVPNAdapterTests.swift	
@@ -12,18 +12,10 @@ import NetworkExtension
 
 class OpenVPNAdapterTests: XCTestCase {
     
-    enum ConfigurationType {
-        case withoutCredentials, withCredentials
-    }
-    
     enum ExpectationsType {
         case connection
     }
     
-    let configurations: [ConfigurationType : String] = [
-        .withoutCredentials: "free_openvpn_udp_jp"
-    ]
-    
     var expectations = [ExpectationsType : XCTestExpectation]()
     
     override func setUp() {
@@ -35,18 +27,75 @@ class OpenVPNAdapterTests: XCTestCase {
         super.tearDown()
     }
     
-    // Test connection without specifying username and password
-    func testConectionWithoutCredentials() {
-        let configuration = getVPNConfiguration(type: .withoutCredentials)
-
+    func testApplyConfiguration() {
         let adapter = OpenVPNAdapter()
+        
+        let configuration = OpenVPNConfiguration()
+        configuration.fileContent = ProfileLoader.getVPNProfile(type: .localVPNServer)
+        configuration.settings = ["auth-user-pass": ""]
+        
+        let result: OpenVPNProperties
         do {
-            try adapter.configure(using: configuration)
+            result = try adapter.apply(configuration: configuration)
         } catch {
             XCTFail("Failed to configure OpenVPN adapted due to error: \(error)")
+            return
         }
         
-        expectations[.connection] = expectation(description: "me.ss-abramchuk.openvpn-adapter.connection-w/o-credentials")
+        XCTAssert(result.remoteHost == "192.168.1.200")
+        XCTAssert(result.remotePort == 1194)
+        XCTAssert(result.remoteProto == .UDP)
+        XCTAssert(result.autologin == false)
+    }
+    
+    func testProvideCredentials() {
+        let adapter = OpenVPNAdapter()
+        
+        let credentials = OpenVPNCredentials()
+        credentials.username = "username"
+        credentials.password = "password"
+        
+        do {
+            try adapter.provide(credentials: credentials)
+        } catch {
+            XCTFail("Failed to provide credentials. \(error)")
+            return
+        }
+    }
+    
+    // Test connection without specifying username and password
+    func testConection() {
+        let adapter = OpenVPNAdapter()
+        
+        let configuration = OpenVPNConfiguration()
+        configuration.fileContent = ProfileLoader.getVPNProfile(type: .localVPNServer)
+        configuration.settings = ["auth-user-pass": ""]
+        
+        let result: OpenVPNProperties
+        do {
+            result = try adapter.apply(configuration: configuration)
+        } catch {
+            XCTFail("Failed to configure OpenVPN adapted due to error: \(error)")
+            return
+        }
+        
+        guard !result.autologin else {
+            XCTFail()
+            return
+        }
+        
+        let credentials = OpenVPNCredentials()
+        credentials.username = "testuser"
+        credentials.password = "nonsecure"
+        
+        do {
+            try adapter.provide(credentials: credentials)
+        } catch {
+            XCTFail("Failed to provide credentials. \(error)")
+            return
+        }
+        
+        expectations[.connection] = expectation(description: "me.ss-abramchuk.openvpn-adapter.connection")
         
         adapter.delegate = self
         adapter.connect()
@@ -58,22 +107,6 @@ class OpenVPNAdapterTests: XCTestCase {
     
 }
 
-extension OpenVPNAdapterTests {
-    
-    func getVPNConfiguration(type: ConfigurationType) -> Data {
-        guard
-            let fileName = configurations[type],
-            let path = Bundle.current.url(forResource: fileName, withExtension: "ovpn"),
-            let configuration = try? Data(contentsOf: path)
-        else {
-            fatalError("Failed to retrieve OpenVPN configuration")
-        }
-        
-        return configuration
-    }
-    
-}
-
 extension OpenVPNAdapterTests: OpenVPNAdapterDelegate {
     
     func configureTunnel(settings: NEPacketTunnelNetworkSettings, callback: @escaping (OpenVPNAdapterPacketFlow?) -> Void) {
@@ -95,7 +128,10 @@ extension OpenVPNAdapterTests: OpenVPNAdapterDelegate {
     }
     
     func handle(error: Error) {
-        
+        if let connectionExpectation = expectations[.connection] {
+            XCTFail("Failed to establish conection. \(error.localizedDescription)")
+            connectionExpectation.fulfill()
+        }
     }
     
     func handle(logMessage: String) {