diff --git a/src/allmydata/test/check_grid.py b/src/allmydata/test/check_grid.py
index 3f5d64da2..d3993ee5e 100644
--- a/src/allmydata/test/check_grid.py
+++ b/src/allmydata/test/check_grid.py
@@ -140,7 +140,7 @@ class GridTester(object):
         if f not in oldfiles:
             raise CommandFailed("um, '%s' was supposed to already be in %s"
                                 % (f, dirname))
-        self.cli("rm", absfilename)
+        self.cli("unlink", absfilename)
         newfiles = self.listdir(dirname)
         if f in newfiles:
             raise CommandFailed("failed to remove '%s' from %s" % (f, dirname))
diff --git a/src/allmydata/test/test_system.py b/src/allmydata/test/test_system.py
index 49aebc2cc..2b7660705 100644
--- a/src/allmydata/test/test_system.py
+++ b/src/allmydata/test/test_system.py
@@ -2227,8 +2227,8 @@ class SystemTest(SystemTestMixin, RunBinTahoeMixin, unittest.TestCase):
             self.failUnlessEqual(data, "data to be uploaded: file1\n")
         d.addCallback(_check_outfile1)
 
-        d.addCallback(run, "rm", "tahoe-file0")
-        d.addCallback(run, "rm", "tahoe:file2")
+        d.addCallback(run, "unlink", "tahoe-file0")
+        d.addCallback(run, "unlink", "tahoe:file2")
         d.addCallback(run, "ls")
         d.addCallback(_check_ls, [], ["tahoe-file0", "file2"])