diff --git a/accessible/tests/mochitest/hittest/a11y.ini b/accessible/tests/mochitest/hittest/a11y.ini
index ca79008639fc..17af9d768c3a 100644
--- a/accessible/tests/mochitest/hittest/a11y.ini
+++ b/accessible/tests/mochitest/hittest/a11y.ini
@@ -5,7 +5,7 @@ support-files = zoom_tree.xul
 
 [test_browser.html]
 [test_canvas_hitregion.html]
-skip-if = (os == "android" || appname == "b2g")
+skip-if = (os == "android")
 [test_general.html]
 [test_menu.xul]
 [test_shadowroot.html]
diff --git a/dom/xhr/tests/mochitest.ini b/dom/xhr/tests/mochitest.ini
index 4a0d7628408c..cd33be6bca38 100644
--- a/dom/xhr/tests/mochitest.ini
+++ b/dom/xhr/tests/mochitest.ini
@@ -70,13 +70,11 @@ support-files =
 [test_bug1300552.html]
 [test_html_in_xhr.html]
 [test_relativeLoad.html]
-skip-if = buildapp == 'b2g' # b2g(Failed to load script: relativeLoad_import.js) b2g-debug(Failed to load script: relativeLoad_import.js) b2g-desktop(Failed to load script: relativeLoad_import.js)
 [test_sync_xhr_timer.xhtml]
 skip-if = toolkit == 'android'
 [test_sync_xhr_unload.html]
 [test_temporaryFileBlob.html]
 [test_worker_terminateSyncXHR.html]
-skip-if = buildapp == 'b2g'
 [test_worker_xhr.html]
 [test_worker_xhr2.html]
 [test_worker_xhr_3rdparty.html]
@@ -84,7 +82,6 @@ skip-if = buildapp == 'b2g'
 [test_worker_xhr_headers.html]
 [test_worker_xhr_implicit_cancel.html]
 [test_worker_xhr_parameters.html]
-skip-if = buildapp == 'b2g'
 [test_worker_xhr_responseURL.html]
 [test_worker_xhr_system.html]
 [test_worker_xhr_timeout.html]
@@ -98,17 +95,14 @@ skip-if = toolkit == 'android'
 [test_XHR_header.html]
 [test_XHR_onuploadprogress.html]
 [test_xhr_overridemimetype_throws_on_invalid_state.html]
-skip-if = buildapp == 'b2g' # Requires webgl support
 [test_XHR_parameters.html]
-skip-if = buildapp == 'b2g' # b2g(86 total, 4 failing - testing mozAnon - got false, expected true) b2g-debug(86 total, 4 failing - testing mozAnon - got false, expected true) b2g-desktop(86 total, 4 failing - testing mozAnon - got false, expected true)
 [test_xhr_progressevents.html]
 skip-if = toolkit == 'android'
 [test_xhr_send.html]
 [test_xhr_send_readystate.html]
 [test_XHR_system.html]
-skip-if = (buildapp == 'b2g') # b2g-debug(12 total, 2 failing - .mozSystem == true - got false, expected true + ) b2g-desktop(12 total, 2 failing - .mozSystem == true - got false, expected true + )
 [test_XHR_timeout.html]
-skip-if = buildapp == 'b2g' || (android_version == '18' && debug) # b2g(flaky on B2G, bug 960743) b2g-debug(flaky on B2G, bug 960743) b2g-desktop(flaky on B2G, bug 960743)
+skip-if = (android_version == '18' && debug)
 support-files = test_XHR_timeout.js
 [test_xhr_withCredentials.html]
 [test_XHRDocURI.html]
diff --git a/testing/cppunittest.ini b/testing/cppunittest.ini
index 54efaf97b6be..c2b618b75eb5 100644
--- a/testing/cppunittest.ini
+++ b/testing/cppunittest.ini
@@ -30,7 +30,6 @@ skip-if = os != 'win'
 [TestMaybe]
 [TestParseFTPList]
 [TestPLDHash]
-skip-if = os == 'b2g'  #Bug 1038197
 [TestPair]
 [TestPoisonArea]
 skip-if = os == 'android' # Bug 1147630
@@ -58,7 +57,6 @@ skip-if = os == 'android' # Bug 1147630
 [ice_unittest]
 [test_nr_socket_unittest]
 [jsapi-tests]
-skip-if = os == 'b2g'  #Bug 1068946
 [multi_tcp_socket_unittest]
 [nrappkit_unittest]
 [rlogringbuffer_unittest]