diff --git a/tests/apitests/python/library/docker_api.py b/tests/apitests/python/library/docker_api.py
index 8fd5fa86a..7ee2c8319 100644
--- a/tests/apitests/python/library/docker_api.py
+++ b/tests/apitests/python/library/docker_api.py
@@ -34,20 +34,18 @@ class DockerAPI(object):
             _tag = "latest"
         if expected_error_message is "":
             expected_error_message = None
-        caught_err = False
         ret = ""
         try:
-            self.DCLIENT.pull(r'{}:{}'.format(image, _tag))
+            ret = self.DCLIENT.pull(r'{}:{}'.format(image, _tag))
             return ret
         except Exception as err:
-            caught_err = True
             if expected_error_message is not None:
                 print( "docker image pull error:", str(err))
                 if str(err).lower().find(expected_error_message.lower()) < 0:
                     raise Exception(r"Pull image: Return message {} is not as expected {}".format(str(err), expected_error_message))
             else:
                 raise Exception(r" Docker pull image {} failed, error is [{}]".format (image, err.message))
-        if caught_err == False:
+        else:
             if expected_error_message is not None:
                 if str(ret).lower().find(expected_error_message.lower()) < 0:
                     raise Exception(r" Failed to catch error [{}] when pull image {}, return message: {}".format (expected_error_message, image, str(ret)))
diff --git a/tests/apitests/python/library/repository.py b/tests/apitests/python/library/repository.py
index cec1b6fd0..497adc818 100644
--- a/tests/apitests/python/library/repository.py
+++ b/tests/apitests/python/library/repository.py
@@ -20,7 +20,8 @@ def push_image_to_project(project_name, registry, username, password, image, tag
     time.sleep(2)
     if expected_login_error_message != None:
         return
-    _docker_api.docker_image_pull(image, tag = tag)
+    ret = _docker_api.docker_image_pull(image, tag = tag)
+    print("docker image pull ret:", ret)
     time.sleep(2)
 
     new_harbor_registry, new_tag = _docker_api.docker_image_tag(r'{}:{}'.format(image, tag), r'{}/{}/{}'.format(registry, project_name, image))
@@ -147,4 +148,4 @@ class Repository(base.Base):
 
         base._assert_status_code(expect_status_code, status_code)
         base._assert_status_code(200, status_code)
-        return data
\ No newline at end of file
+        return data
diff --git a/tests/resources/Harbor-Util.robot b/tests/resources/Harbor-Util.robot
index 1d6fbe261..00bd39b6a 100644
--- a/tests/resources/Harbor-Util.robot
+++ b/tests/resources/Harbor-Util.robot
@@ -55,7 +55,9 @@ Package Harbor Offline
     [Arguments]  ${with_notary}=true  ${with_clair}=true  ${with_migrator}=true  ${with_chartmuseum}=true
     Log To Console  \nStart Docker Daemon
     Start Docker Daemon Locally
-    docker login -u $DOCKER_HUB_USERNAME -p $DOCKER_HUB_PASSWORD
+    ${rc}  ${output}=  Run And Return Rc And Output  docker login -u $DOCKER_HUB_USERNAME -p $DOCKER_HUB_PASSWORD
+    Log  ${rc}
+    Log  ${output}
     Log To Console  \n\nmake package_offline BASEIMAGETAG=%{Harbor_Build_Base_Tag} NPM_REGISTRY=%{NPM_REGISTRY} VERSIONTAG=%{Harbor_Assets_Version} PKGVERSIONTAG=%{Harbor_Package_Version} NOTARYFLAG=${with_notary} CLAIRFLAG=${with_clair} MIGRATORFLAG=${with_migrator} CHARTFLAG=${with_chartmuseum} HTTPPROXY=
     ${rc}  ${output}=  Run And Return Rc And Output  make package_offline BASEIMAGETAG=%{Harbor_Build_Base_Tag} NPM_REGISTRY=%{NPM_REGISTRY} VERSIONTAG=%{Harbor_Assets_Version} PKGVERSIONTAG=%{Harbor_Package_Version} NOTARYFLAG=${with_notary} CLAIRFLAG=${with_clair} MIGRATORFLAG=${with_migrator} CHARTFLAG=${with_chartmuseum} HTTPPROXY=
     Log To Console  ${rc}
@@ -66,7 +68,9 @@ Package Harbor Online
     [Arguments]  ${with_notary}=true  ${with_clair}=true  ${with_migrator}=false  ${with_chartmuseum}=true
     Log To Console  \nStart Docker Daemon
     Start Docker Daemon Locally
-    docker login -u $DOCKER_HUB_USERNAME -p $DOCKER_HUB_PASSWORD
+    ${rc}  ${output}=  Run And Return Rc And Output  docker login -u $DOCKER_HUB_USERNAME -p $DOCKER_HUB_PASSWORD
+    Log  ${rc}
+    Log  ${output}
     Log To Console  \nmake package_online VERSIONTAG=%{Harbor_Assets_Version} PKGVERSIONTAG=%{Harbor_Package_Version} NOTARYFLAG=${with_notary} CLAIRFLAG=${with_clair} MIGRATORFLAG=${with_migrator} CHARTFLAG=${with_chartmuseum} HTTPPROXY=
     ${rc}  ${output}=  Run And Return Rc And Output  make package_online VERSIONTAG=%{Harbor_Assets_Version} PKGVERSIONTAG=%{Harbor_Package_Version} NOTARYFLAG=${with_notary} CLAIRFLAG=${with_clair} MIGRATORFLAG=${with_migrator} CHARTFLAG=${with_chartmuseum} HTTPPROXY=
     Log  ${rc}