diff --git a/dom/imptests/importTestsuite.py b/dom/imptests/importTestsuite.py
index 31193a6c5a3..a5da76acd12 100644
--- a/dom/imptests/importTestsuite.py
+++ b/dom/imptests/importTestsuite.py
@@ -20,8 +20,6 @@ import sys
 import parseManifest
 import writeBuildFiles
 
-HEADERS_SUFFIX = "^headers^"
-
 def parseManifestFile(dest, dir):
     subdirs, mochitests, _, __, supportfiles = parseManifest.parseManifestFile("hg-%s/%s/MANIFEST" % (dest, dir))
     return subdirs, mochitests, supportfiles
@@ -54,13 +52,6 @@ def makePath(a, b):
         return a
     return "%s/%s" % (a, b)
 
-def copyTest(source, dest):
-    """Copy the file at source to dest, as well as any ^headers^ file associated
-    with it."""
-    shutil.copy(source, dest)
-    if os.path.exists(source + HEADERS_SUFFIX):
-        shutil.copy(source + HEADERS_SUFFIX, dest + HEADERS_SUFFIX)
-
 def copy(dest, directories):
     """Copy mochitests and support files from the external HG directory to their
     place in mozilla-central.
@@ -73,9 +64,9 @@ def copy(dest, directories):
         os.makedirs(destdir)
 
         for mochitest in mochitests:
-            copyTest("%s/%s" % (sourcedir, mochitest), "%s/test_%s" % (destdir, mochitest))
+            shutil.copy("%s/%s" % (sourcedir, mochitest), "%s/test_%s" % (destdir, mochitest))
         for support in supportfiles:
-            copyTest("%s/%s" % (sourcedir, support), "%s/%s" % (destdir, support))
+            shutil.copy("%s/%s" % (sourcedir, support), "%s/%s" % (destdir, support))
 
         if len(subdirs):
             if d:
@@ -110,7 +101,6 @@ def printBuildFiles(dest, directories):
 
         files = ["test_%s" % (mochitest, ) for mochitest in mochitests]
         files.extend(supportfiles)
-        files.extend(f for f in os.listdir(path) if f.endswith(HEADERS_SUFFIX))
 
         with open(path + "/Makefile.in", "w") as fh:
             result = writeBuildFiles.substMakefile("importTestsuite.py", files)