diff --git a/tools/test_pr.py b/tools/test_pr.py
new file mode 100755
index 0000000..d3f31a5
--- /dev/null
+++ b/tools/test_pr.py
@@ -0,0 +1,141 @@
+"""
+This is a script for testing pull requests for IPython. It merges the pull
+request with current master, installs and tests on all available versions of
+Python, and posts the results to Gist if any tests fail.
+
+Usage:
+    python test_pr.py 1657
+"""
+from __future__ import print_function
+
+import errno
+from glob import glob
+import json
+import os
+import shutil
+from subprocess import call, check_call, check_output, PIPE, STDOUT, CalledProcessError
+try:
+    from urllib.request import urlopen
+except ImportError:
+    from urllib2 import urlopen
+
+basedir = os.path.join(os.path.expanduser("~"), ".ipy_pr_tests")
+repodir = os.path.join(basedir, "ipython")
+ipy_repository = 'git://github.com/ipython/ipython.git'
+
+supported_pythons = ['python2.6', 'python2.7', 'python3.1', 'python3.2']
+unavailable_pythons = []
+
+def available_python_versions():
+    """Get the executable names of available versions of Python on the system.
+    """
+    del unavailable_pythons[:]
+    for py in supported_pythons:
+        try:
+            check_call([py, '-c', 'import nose'], stdout=PIPE)
+            yield py
+        except (OSError, CalledProcessError):
+            unavailable_pythons.append(py)
+
+venvs = []
+
+def setup():
+    """Prepare the repository and virtualenvs."""
+    global venvs
+    
+    try:
+        os.mkdir(basedir)
+    except OSError as e:
+        if e.errno != errno.EEXIST:
+            raise
+    os.chdir(basedir)
+    
+    # Delete virtualenvs and recreate
+    for venv in glob('venv-*'):
+        shutil.rmtree(venv)
+    for py in available_python_versions():
+        check_call(['virtualenv', '-p', py, '--system-site-packages', 'venv-%s' % py])
+        venvs.append((py, 'venv-%s' % py))
+    
+    # Check out and update the repository
+    if not os.path.exists('ipython'):
+        check_call(['git', 'clone', ipy_repository])
+    os.chdir(repodir)
+    check_call(['git', 'checkout', 'master'])
+    check_call(['git', 'pull', ipy_repository, 'master'])
+    os.chdir(basedir)
+
+def get_pull_request(num, project="ipython/ipython"):
+    url = "https://api.github.com/repos/{project}/pulls/{num}".format(project=project, num=num)
+    response = urlopen(url).read().decode('utf-8')
+    return json.loads(response)
+
+def merge_branch(repo, branch, owner):
+    merged_branch = "%s-%s" % (owner, branch)
+    os.chdir(repodir)
+    # Delete the branch first
+    call(['git', 'branch', '-D', merged_branch])
+    check_call(['git', 'checkout', '-b', merged_branch])
+    check_call(['git', 'pull', repo, branch])
+    os.chdir(basedir)
+
+def run_tests(venv):
+    py = os.path.join(basedir, venv, 'bin', 'python')
+    print(py)
+    os.chdir(repodir)
+    check_call([py, 'setup.py', 'install'])
+    os.chdir(basedir)
+    
+    iptest = os.path.join(basedir, venv, 'bin', 'iptest')
+    if not os.path.exists(iptest):
+        iptest = os.path.join(basedir, venv, 'bin', 'iptest3')
+        
+    print("\nRunning tests, this typically takes a few minutes...")
+    try:
+        return True, check_output([iptest], stderr=STDOUT).decode('utf-8')
+    except CalledProcessError as e:
+        return False, e.output
+
+def post_gist(content, description='IPython test log', filename="results.log"):
+    """Post some text to a Gist, and return the URL."""
+    post_data = json.dumps({
+      "description": description,
+      "public": True,
+      "files": {
+        filename: {
+          "content": content
+        }
+      }
+    }).encode('utf-8')
+    
+    response = urlopen("https://api.github.com/gists", post_data)
+    response_data = json.loads(response.read().decode('utf-8'))
+    return response_data['html_url']
+
+if __name__ == '__main__':
+    import sys
+    num = sys.argv[1]
+    setup()
+    pr = get_pull_request(num)
+    merge_branch(repo=pr['head']['repo']['clone_url'], 
+                 branch=pr['head']['ref'],
+                 owner=pr['head']['repo']['owner']['login'])
+    
+    results = []
+    for py, venv in venvs:
+        passed, log = run_tests(venv)
+        if passed:
+            results.append((py, True, None))
+        else:
+            gist_url = post_gist(log)
+            results.append((py, False, gist_url))
+    
+    print("\n")
+    print("**Test results for commit %s merged into master**" % pr['head']['sha'][:7])
+    for py, passed, gist_url in results:
+        if passed:
+            print(py, ":", "OK")
+        else:
+            print(py, ":", "Failed")
+            print("    Test log:", gist_url)
+    print("Not available for testing:", ", ".join(unavailable_pythons))