diff --git a/cms/static/coffee/.gitignore b/cms/static/coffee/.gitignore
deleted file mode 100644
index a6c7c2852d..0000000000
--- a/cms/static/coffee/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-*.js
diff --git a/cms/static/coffee/spec/models/course_spec.coffee b/cms/static/coffee/spec/models/course_spec.js
similarity index 100%
rename from cms/static/coffee/spec/models/course_spec.coffee
rename to cms/static/coffee/spec/models/course_spec.js
diff --git a/cms/static/coffee/spec/models/metadata_spec.coffee b/cms/static/coffee/spec/models/metadata_spec.js
similarity index 100%
rename from cms/static/coffee/spec/models/metadata_spec.coffee
rename to cms/static/coffee/spec/models/metadata_spec.js
diff --git a/cms/static/coffee/spec/models/section_spec.coffee b/cms/static/coffee/spec/models/section_spec.js
similarity index 100%
rename from cms/static/coffee/spec/models/section_spec.coffee
rename to cms/static/coffee/spec/models/section_spec.js
diff --git a/cms/static/coffee/spec/models/settings_course_grader_spec.coffee b/cms/static/coffee/spec/models/settings_course_grader_spec.js
similarity index 100%
rename from cms/static/coffee/spec/models/settings_course_grader_spec.coffee
rename to cms/static/coffee/spec/models/settings_course_grader_spec.js
diff --git a/cms/static/coffee/spec/models/settings_grading_spec.coffee b/cms/static/coffee/spec/models/settings_grading_spec.js
similarity index 100%
rename from cms/static/coffee/spec/models/settings_grading_spec.coffee
rename to cms/static/coffee/spec/models/settings_grading_spec.js
diff --git a/cms/static/coffee/spec/models/textbook_spec.coffee b/cms/static/coffee/spec/models/textbook_spec.js
similarity index 100%
rename from cms/static/coffee/spec/models/textbook_spec.coffee
rename to cms/static/coffee/spec/models/textbook_spec.js
diff --git a/cms/static/coffee/spec/models/upload_spec.coffee b/cms/static/coffee/spec/models/upload_spec.js
similarity index 100%
rename from cms/static/coffee/spec/models/upload_spec.coffee
rename to cms/static/coffee/spec/models/upload_spec.js
diff --git a/cms/static/coffee/spec/views/assets_spec.coffee b/cms/static/coffee/spec/views/assets_spec.js
similarity index 100%
rename from cms/static/coffee/spec/views/assets_spec.coffee
rename to cms/static/coffee/spec/views/assets_spec.js
diff --git a/cms/static/coffee/spec/views/course_info_spec.coffee b/cms/static/coffee/spec/views/course_info_spec.js
similarity index 100%
rename from cms/static/coffee/spec/views/course_info_spec.coffee
rename to cms/static/coffee/spec/views/course_info_spec.js
diff --git a/cms/static/coffee/spec/views/metadata_edit_spec.coffee b/cms/static/coffee/spec/views/metadata_edit_spec.js
similarity index 100%
rename from cms/static/coffee/spec/views/metadata_edit_spec.coffee
rename to cms/static/coffee/spec/views/metadata_edit_spec.js
diff --git a/cms/static/coffee/spec/views/textbook_spec.coffee b/cms/static/coffee/spec/views/textbook_spec.js
similarity index 100%
rename from cms/static/coffee/spec/views/textbook_spec.coffee
rename to cms/static/coffee/spec/views/textbook_spec.js
diff --git a/cms/static/coffee/spec/views/upload_spec.coffee b/cms/static/coffee/spec/views/upload_spec.js
similarity index 100%
rename from cms/static/coffee/spec/views/upload_spec.coffee
rename to cms/static/coffee/spec/views/upload_spec.js
diff --git a/common/lib/capa/capa/tests/test_files/js/.gitignore b/common/lib/capa/capa/tests/test_files/js/.gitignore
deleted file mode 100644
index d2910668f2..0000000000
--- a/common/lib/capa/capa/tests/test_files/js/.gitignore
+++ /dev/null
@@ -1,4 +0,0 @@
-test_problem_display.js
-test_problem_generator.js
-test_problem_grader.js
-xproblem.js
\ No newline at end of file
diff --git a/common/lib/capa/capa/tests/test_files/js/test_problem_display.coffee b/common/lib/capa/capa/tests/test_files/js/test_problem_display.js
similarity index 100%
rename from common/lib/capa/capa/tests/test_files/js/test_problem_display.coffee
rename to common/lib/capa/capa/tests/test_files/js/test_problem_display.js
diff --git a/common/lib/capa/capa/tests/test_files/js/test_problem_generator.coffee b/common/lib/capa/capa/tests/test_files/js/test_problem_generator.js
similarity index 100%
rename from common/lib/capa/capa/tests/test_files/js/test_problem_generator.coffee
rename to common/lib/capa/capa/tests/test_files/js/test_problem_generator.js
diff --git a/common/lib/capa/capa/tests/test_files/js/test_problem_grader.coffee b/common/lib/capa/capa/tests/test_files/js/test_problem_grader.js
similarity index 100%
rename from common/lib/capa/capa/tests/test_files/js/test_problem_grader.coffee
rename to common/lib/capa/capa/tests/test_files/js/test_problem_grader.js
diff --git a/common/lib/capa/capa/tests/test_files/js/xproblem.coffee b/common/lib/capa/capa/tests/test_files/js/xproblem.js
similarity index 100%
rename from common/lib/capa/capa/tests/test_files/js/xproblem.coffee
rename to common/lib/capa/capa/tests/test_files/js/xproblem.js
diff --git a/common/lib/xmodule/xmodule/js/spec/.gitignore b/common/lib/xmodule/xmodule/js/spec/.gitignore
deleted file mode 100644
index ab5950468c..0000000000
--- a/common/lib/xmodule/xmodule/js/spec/.gitignore
+++ /dev/null
@@ -1,10 +0,0 @@
-*.js
-
-# Tests for video are written in pure JavaScript.
-!video/*.js
-
-# Tests for Time are written in pure JavaScript.
-!time_spec.js
-!collapsible_spec.js
-!xmodule_spec.js
-!sequence/display_spec.js
diff --git a/common/lib/xmodule/xmodule/js/spec/annotatable/display_spec.coffee b/common/lib/xmodule/xmodule/js/spec/annotatable/display_spec.js
similarity index 100%
rename from common/lib/xmodule/xmodule/js/spec/annotatable/display_spec.coffee
rename to common/lib/xmodule/xmodule/js/spec/annotatable/display_spec.js
diff --git a/common/lib/xmodule/xmodule/js/spec/capa/display_spec.coffee b/common/lib/xmodule/xmodule/js/spec/capa/display_spec.js
similarity index 100%
rename from common/lib/xmodule/xmodule/js/spec/capa/display_spec.coffee
rename to common/lib/xmodule/xmodule/js/spec/capa/display_spec.js
diff --git a/common/lib/xmodule/xmodule/js/spec/html/edit_spec.coffee b/common/lib/xmodule/xmodule/js/spec/html/edit_spec.js
similarity index 100%
rename from common/lib/xmodule/xmodule/js/spec/html/edit_spec.coffee
rename to common/lib/xmodule/xmodule/js/spec/html/edit_spec.js
diff --git a/common/lib/xmodule/xmodule/js/spec/problem/edit_spec.coffee b/common/lib/xmodule/xmodule/js/spec/problem/edit_spec.js
similarity index 100%
rename from common/lib/xmodule/xmodule/js/spec/problem/edit_spec.coffee
rename to common/lib/xmodule/xmodule/js/spec/problem/edit_spec.js
diff --git a/common/lib/xmodule/xmodule/js/spec/problem/edit_spec_hint.coffee b/common/lib/xmodule/xmodule/js/spec/problem/edit_spec_hint.js
similarity index 100%
rename from common/lib/xmodule/xmodule/js/spec/problem/edit_spec_hint.coffee
rename to common/lib/xmodule/xmodule/js/spec/problem/edit_spec_hint.js
diff --git a/common/lib/xmodule/xmodule/js/spec/tabs/edit.coffee b/common/lib/xmodule/xmodule/js/spec/tabs/edit.js
similarity index 100%
rename from common/lib/xmodule/xmodule/js/spec/tabs/edit.coffee
rename to common/lib/xmodule/xmodule/js/spec/tabs/edit.js
diff --git a/common/static/coffee/spec/.gitignore b/common/static/coffee/spec/.gitignore
deleted file mode 100644
index a6c7c2852d..0000000000
--- a/common/static/coffee/spec/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-*.js
diff --git a/common/static/coffee/spec/jquery.immediateDescendents_spec.coffee b/common/static/coffee/spec/jquery.immediateDescendents_spec.js
similarity index 100%
rename from common/static/coffee/spec/jquery.immediateDescendents_spec.coffee
rename to common/static/coffee/spec/jquery.immediateDescendents_spec.js
diff --git a/lms/static/coffee/.gitignore b/lms/static/coffee/.gitignore
deleted file mode 100644
index a6c7c2852d..0000000000
--- a/lms/static/coffee/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-*.js
diff --git a/lms/static/coffee/spec/calculator_spec.coffee b/lms/static/coffee/spec/calculator_spec.js
similarity index 100%
rename from lms/static/coffee/spec/calculator_spec.coffee
rename to lms/static/coffee/spec/calculator_spec.js
diff --git a/lms/static/coffee/spec/courseware_spec.coffee b/lms/static/coffee/spec/courseware_spec.js
similarity index 100%
rename from lms/static/coffee/spec/courseware_spec.coffee
rename to lms/static/coffee/spec/courseware_spec.js
diff --git a/lms/static/coffee/spec/feedback_form_spec.coffee b/lms/static/coffee/spec/feedback_form_spec.js
similarity index 100%
rename from lms/static/coffee/spec/feedback_form_spec.coffee
rename to lms/static/coffee/spec/feedback_form_spec.js
diff --git a/lms/static/coffee/spec/helper.coffee b/lms/static/coffee/spec/helper.js
similarity index 100%
rename from lms/static/coffee/spec/helper.coffee
rename to lms/static/coffee/spec/helper.js
diff --git a/lms/static/coffee/spec/histogram_spec.coffee b/lms/static/coffee/spec/histogram_spec.js
similarity index 100%
rename from lms/static/coffee/spec/histogram_spec.coffee
rename to lms/static/coffee/spec/histogram_spec.js
diff --git a/lms/static/coffee/spec/modules/tab_spec.coffee b/lms/static/coffee/spec/modules/tab_spec.js
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rename from lms/static/coffee/spec/modules/tab_spec.coffee
rename to lms/static/coffee/spec/modules/tab_spec.js
diff --git a/lms/static/coffee/spec/requirejs_spec.coffee b/lms/static/coffee/spec/requirejs_spec.js
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rename from lms/static/coffee/spec/requirejs_spec.coffee
rename to lms/static/coffee/spec/requirejs_spec.js