diff --git a/testing/marionette/client/marionette_driver/marionette.py b/testing/marionette/client/marionette_driver/marionette.py
index a06bbdf1ecad..f96d304b9a9a 100644
--- a/testing/marionette/client/marionette_driver/marionette.py
+++ b/testing/marionette/client/marionette_driver/marionette.py
@@ -1908,14 +1908,6 @@ class Marionette(object):
         body = {"script": js}
         self._send_message("importScript", body)
 
-    def clear_imported_scripts(self):
-        """Clears all imported scripts in this context, ie: calling
-        clear_imported_scripts in chrome context will clear only scripts
-        you imported in chrome, and will leave the scripts you imported
-        in content context.
-        """
-        self._send_message("clearImportedScripts")
-
     def add_cookie(self, cookie):
         """Adds a cookie to your current session.
 
diff --git a/testing/marionette/harness/marionette_harness/marionette_test/testcases.py b/testing/marionette/harness/marionette_harness/marionette_test/testcases.py
index fcc5d1a07e52..5187bfac795d 100644
--- a/testing/marionette/harness/marionette_harness/marionette_test/testcases.py
+++ b/testing/marionette/harness/marionette_harness/marionette_test/testcases.py
@@ -346,7 +346,6 @@ class MarionetteTestCase(CommonTestCase):
 
         if not self.marionette.crashed:
             try:
-                self.marionette.clear_imported_scripts()
                 self.marionette.execute_script("log('TEST-END: {0}')"
                                                .format(self.test_name),
                                                sandbox="simpletest")