diff --git a/check.py b/check.py
index c96e48f..b78b8eb 100755
--- a/check.py
+++ b/check.py
@@ -4,6 +4,7 @@ from datetime import datetime
 import email
 import email.policy
 import os
+from os.path import exists
 import sys
 import stat
 import subprocess
@@ -24,6 +25,7 @@ import late
 import login
 import signature
 from test import MailTest
+import tests
 
 def signcheck(data):
     yield MailTest("Those tests are limited to signature checking. THIS IS NOT THE SUBMISSION INTERFACE.", 2)
@@ -54,6 +56,8 @@ def gen_checks(gpgmail, submissions_dir, check_content=False, check_submission_h
         yield ( archive.hash_archive, [submissions_dir, check_submission_hash] )
         yield archive.guess_mime
         yield ( archive.extract, [submissions_dir] )
+        if exists(submissions_dir + ".sh"):
+            yield ( tests.run_script, [submissions_dir + ".sh"] )
 
 
 def respondissueemail(to, subject, ref, initial_to=None):
diff --git a/tests.py b/tests.py
new file mode 100644
index 0000000..581a8c0
--- /dev/null
+++ b/tests.py
@@ -0,0 +1,23 @@
+import subprocess
+
+from test import MailTest
+
+def run_script(dest, script):
+    with subprocess.Popen(
+            ["/bin/sh", script],
+            cwd=dest,
+            env={"LANG": 'C'},
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE
+    ) as p:
+        p.wait()
+        err = p.stdout.read().decode('utf-8', 'replace')
+        err += p.stderr.read().decode('utf-8', 'replace')
+        if p.returncode == 0:
+            yield MailTest("Preliminary tests:", details=err.replace(dest, "/rendu/"))
+            yield dest
+        elif p.returncode == 124 or p.returncode == 137:
+            yield MailTest("Preliminary tests aborted for too long execution:", 1, details=err.replace(dest, "/rendu/"))
+        else:
+            yield MailTest("An error occured during preliminary tests:", 2, details=err.replace(dest, "/rendu/"))
+            yield dest