我正在按照Push上的说明进行部署，以使用Jenkins测试和部署以python和Flask编写的Google App Engine应用。

测试位于应用程序的根文件夹中，该文件名为 tests.py

执行外壳步骤中的命令是

nosetests tests.py

我收到以下错误，由于我对Jenkins相当陌生，因此我不确定如何解决此问题。

Started by user User Name
Building remotely on cloud-dev-php in workspace /var/jenkins/workspace/CFC Melbourne production pipeline
 > git rev-parse --is-inside-work-tree # timeout=10
Fetching changes from the remote Git repository
 > git config remote.origin.url https://source.developers.google.com/p/cfc-melbourne-website/ # timeout=10
Fetching upstream changes from https://source.developers.google.com/p/cfc-melbourne-website/
 > git --version # timeout=10
using .gitcredentials to set credentials
 > git config --local credential.helper store --file=/tmp/git7069316934747655973.credentials # timeout=10
 > git -c core.askpass=true fetch --tags --progress https://source.developers.google.com/p/cfc-melbourne-website/ +refs/heads/*:refs/remotes/origin/*
 > git config --local --remove-section credential # timeout=10
 > git rev-parse refs/remotes/origin/master^{commit} # timeout=10
 > git rev-parse refs/remotes/origin/origin/master^{commit} # timeout=10
Checking out Revision 3a8caffa38303b3ae4741aac83e6ac807077b5be (refs/remotes/origin/master)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f 3a8caffa38303b3ae4741aac83e6ac807077b5be
 > git rev-list 3a8caffa38303b3ae4741aac83e6ac807077b5be # timeout=10
[CFC Melbourne production pipeline] $ /bin/sh -xe /tmp/hudson3364335209750264714.sh
+ nosetests tests.py
/tmp/hudson3364335209750264714.sh: 2: /tmp/hudson3364335209750264714.sh: nosetests: not found
Build step 'Execute shell' marked build as failure
Finished: FAILURE