diff --git a/docker/Dockerfile b/docker/Dockerfile
index a0cd7e2b..88e21b18 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,18 +1,22 @@
 FROM selenium/node-chrome
 
+ARG G4F_VERSION
+ARG G4F_USER=g4f
+ARG G4F_USER_ID=1000
+ARG G4F_NO_GUI
+ARG G4F_PASS=secret
+
+ENV G4F_VERSION $G4F_VERSION
+ENV G4F_USER $G4F_USER
+ENV G4F_USER_ID $G4F_USER_ID
+ENV G4F_NO_GUI $G4F_NO_GUI
+
 ENV SE_SCREEN_WIDTH 1850
 ENV PYTHONUNBUFFERED 1
 ENV G4F_DIR /app
-ENV G4F_LOGIN_URL http://localhost:7900/?autoconnect=1&resize=scale&password=secret
-ARG G4F_VERSION
-ENV G4F_VERSION ${G4F_VERSION}
-ARG G4F_USER
-ENV G4F_USER ${G4F_USER:-g4f}
-ARG G4F_USER_ID
-ENV G4F_USER_ID ${G4F_USER_ID:-1000}
-ARG G4F_NO_GUI
-ENV G4F_NO_GUI $G4F_NO_GUI
+ENV G4F_LOGIN_URL http://localhost:7900/?autoconnect=1&resize=scale&password=$G4F_PASS
 ENV HOME /home/$G4F_USER
+ENV PATH $PATH:$HOME/.local/bin
 ENV SE_DOWNLOAD_DIR $HOME/Downloads
 ENV SEL_USER $G4F_USER
 ENV SEL_UID $G4F_USER_ID
@@ -33,6 +37,9 @@ RUN apt-get -qqy update \
     python-is-python3 \
     pip
 
+# Remove java
+RUN apt-get -qyy remove openjdk-11-jre-headless
+
 # Cleanup
 RUN rm -rf /var/lib/apt/lists/* /var/cache/apt/* \
   && apt-get -qyy autoremove \
@@ -51,16 +58,22 @@ RUN if [ "$G4F_NO_GUI" ] ; then \
 COPY docker/background.png /usr/share/images/fluxbox/ubuntu-light.png
 
 # Add user
-RUN groupadd -g $G4F_USER_ID $G4F_USER
-RUN useradd -rm -G sudo -u $G4F_USER_ID -g $G4F_USER_ID $G4F_USER
+RUN groupadd -g $G4F_USER_ID $G4F_USER \
+  && useradd -rm -G sudo -u $G4F_USER_ID -g $G4F_USER_ID $G4F_USER \
+  && echo "${G4F_USER}:${G4F_PASS}" | chpasswd
 
 # Fix permissions
 RUN mkdir "${SE_DOWNLOAD_DIR}"
 RUN chown "${G4F_USER_ID}:${G4F_USER_ID}" $SE_DOWNLOAD_DIR /var/run/supervisor /var/log/supervisor
+RUN chown "${G4F_USER_ID}:${G4F_USER_ID}" -R /opt/bin/ /usr/bin/chromedriver /opt/selenium/
 
 # Switch user
 USER $G4F_USER_ID
 
+# Set VNC password
+RUN mkdir -p ${HOME}/.vnc \
+  && x11vnc -storepasswd ${G4F_PASS} ${HOME}/.vnc/passwd
+
 # Set the working directory in the container.
 WORKDIR $G4F_DIR
 
diff --git a/etc/testing/_providers.py b/etc/testing/_providers.py
index 0194318c..947fe7a0 100644
--- a/etc/testing/_providers.py
+++ b/etc/testing/_providers.py
@@ -4,24 +4,22 @@ from colorama import Fore, Style
 
 sys.path.append(str(Path(__file__).parent.parent))
 
-from g4f import BaseProvider, models, Provider
-
-logging = False
+from g4f import Provider, ProviderType, models
+from g4f.Provider import __providers__
 
 
 def main():
     providers = get_providers()
     failed_providers = []
 
-    for _provider in providers:
-        if _provider.needs_auth:
+    for provider in providers:
+        if provider.needs_auth:
             continue
-        print("Provider:", _provider.__name__)
-        result = test(_provider)
+        print("Provider:", provider.__name__)
+        result = test(provider)
         print("Result:", result)
-        if _provider.working and not result:
-            failed_providers.append(_provider)
-
+        if provider.working and not result:
+            failed_providers.append(provider)
     print()
 
     if failed_providers:
@@ -32,38 +30,29 @@ def main():
         print(f"{Fore.GREEN + Style.BRIGHT}All providers are working")
 
 
-def get_providers() -> list[type[BaseProvider]]:
-    providers = dir(Provider)
-    providers = [getattr(Provider, provider) for provider in providers if provider != "RetryProvider"]
-    providers = [provider for provider in providers if isinstance(provider, type) and hasattr(provider, "url")]
+def get_providers() -> list[ProviderType]:
     return [
         provider
-        for provider in providers
-        if issubclass(provider, BaseProvider)
-        and provider.__name__ not in dir(Provider.deprecated)
+        for provider in __providers__
+        if provider.__name__ not in dir(Provider.deprecated)
         and provider.__name__ not in dir(Provider.unfinished)
     ]
 
-
-def create_response(_provider: type[BaseProvider]) -> str:
-    model = models.gpt_35_turbo.name if _provider.supports_gpt_35_turbo else models.default.name
-    response = _provider.create_completion(
-        model=model,
+def create_response(provider: ProviderType) -> str:
+    response = provider.create_completion(
+        model=models.default.name,
         messages=[{"role": "user", "content": "Hello, who are you? Answer in detail much as possible."}],
         stream=False,
     )
     return "".join(response)
 
-    
-def test(_provider: type[BaseProvider]) -> bool:
+def test(provider: ProviderType) -> bool:
     try:
-        response = create_response(_provider)
+        response = create_response(provider)
         assert type(response) is str
         assert len(response) > 0
         return response
-    except Exception as e:
-        if logging:
-            print(e)
+    except Exception:
         return False
 
 
diff --git a/g4f/__init__.py b/g4f/__init__.py
index 57151376..699dc238 100644
--- a/g4f/__init__.py
+++ b/g4f/__init__.py
@@ -128,7 +128,7 @@ class Completion:
 
         return result if stream else ''.join(result)
     
-def get_last_provider(as_dict: bool = False) -> ProviderType:
+def get_last_provider(as_dict: bool = False) -> Union[ProviderType, dict[str, str]]:
     last = debug.last_provider
     if isinstance(last, BaseRetryProvider):
         last = last.last_provider
diff --git a/g4f/gui/server/backend.py b/g4f/gui/server/backend.py
index 1aa506b2..595f5aa1 100644
--- a/g4f/gui/server/backend.py
+++ b/g4f/gui/server/backend.py
@@ -1,3 +1,4 @@
+import logging
 import g4f
 from g4f.Provider import __providers__
 
@@ -94,10 +95,10 @@ class Backend_Api:
                     }) + "\n"
                 
             except Exception as e:
+                logging.exception(e)
                 yield json.dumps({
                     'type' : 'error',
                     'error': f'{e.__class__.__name__}: {e}'
                 })
-                raise e
 
         return self.app.response_class(try_response(), mimetype='text/event-stream')
\ No newline at end of file