--- a/layout/style/test/chrome/chrome.ini
+++ b/layout/style/test/chrome/chrome.ini
@@ -1,10 +1,10 @@
 [DEFAULT]
-skip-if = buildapp == 'b2g' || os == 'android'
+skip-if = os == 'android'
 support-files =
   bug418986-2.js
   bug535806-css.css
   bug535806-html.html
   bug535806-xul.xul
   hover_helper.html
   match.png
   mismatch.png
@@ -13,10 +13,9 @@ support-files =
 [test_bug418986-2.xul]
 [test_bug1157097.html]
 [test_bug1160724.xul]
 [test_bug535806.xul]
 [test_display_mode.html]
 [test_display_mode_reflow.html]
 tags = fullscreen
 [test_hover.html]
-skip-if = buildapp == 'mulet'
 [test_moz_document_rules.html]

--- a/layout/style/test/mochitest.ini
+++ b/layout/style/test/mochitest.ini
@@ -52,17 +52,16 @@ support-files = file_animations_effect_t
 [test_animations_effect_timing_iterations.html]
 support-files = file_animations_effect_timing_iterations.html
 [test_animations_event_order.html]
 [test_animations_event_handler_attribute.html]
 [test_animations_iterationstart.html]
 support-files = file_animations_iterationstart.html
 [test_animations_omta.html]
 [test_animations_omta_start.html]
-skip-if = (buildapp == 'b2g' && toolkit != 'gonk') # bug 1041017
 [test_animations_pausing.html]
 support-files = file_animations_pausing.html
 [test_animations_playbackrate.html]
 support-files = file_animations_playbackrate.html
 [test_animations_styles_on_event.html]
 support-files = file_animations_styles_on_event.html
 [test_animations_with_disabled_properties.html]
 support-files = file_animations_with_disabled_properties.html
@@ -191,17 +190,16 @@ support-files = flexbox_layout_testcases
 [test_font_face_parser.html]
 [test_font_family_parsing.html]
 [test_font_feature_values_parsing.html]
 [test_font_loading_api.html]
 support-files =
   BitPattern.woff
   file_font_loading_api_vframe.html
 [test_garbage_at_end_of_declarations.html]
-skip-if = (toolkit == 'gonk' && debug) # Bug 1186440
 [test_grid_container_shorthands.html]
 [test_grid_item_shorthands.html]
 [test_grid_shorthand_serialization.html]
 [test_grid_computed_values.html]
 [test_group_insertRule.html]
 [test_hover_quirk.html]
 [test_html_attribute_computed_values.html]
 [test_ident_escaping.html]
@@ -209,19 +207,18 @@ skip-if = (toolkit == 'gonk' && debug) #
 skip-if = toolkit == 'android'
 [test_inherit_storage.html]
 [test_initial_computation.html]
 skip-if = toolkit == 'android'
 [test_initial_storage.html]
 [test_keyframes_rules.html]
 [test_load_events_on_stylesheets.html]
 [test_logical_properties.html]
-skip-if = (toolkit == 'gonk' && debug) # Bug 1186224
 [test_media_queries.html]
-skip-if = (toolkit == 'gonk' && debug) || android_version == '18' #debug-only failure; timed out #Android 4.3 aws only; bug 1030419
+skip-if = android_version == '18' #debug-only failure; timed out #Android 4.3 aws only; bug 1030419
 [test_media_queries_dynamic.html]
 [test_media_queries_dynamic_xbl.html]
 [test_media_query_list.html]
 [test_moz_device_pixel_ratio.html]
 [test_namespace_rule.html]
 [test_of_type_selectors.xhtml]
 [test_page_parser.html]
 [test_parse_eof.html]
@@ -231,31 +228,28 @@ skip-if = (toolkit == 'gonk' && debug) |
 [test_parser_diagnostics_unprintables.html]
 [test_pixel_lengths.html]
 [test_pointer-events.html]
 [test_position_float_display.html]
 [test_position_sticky.html]
 [test_priority_preservation.html]
 [test_property_database.html]
 [test_property_syntax_errors.html]
-skip-if = (toolkit == 'gonk' && debug) # Bug 1186224
 [test_pseudoelement_state.html]
-skip-if = (toolkit == 'gonk' && debug) #debug-only failure
 [test_pseudoelement_parsing.html]
 [test_redundant_font_download.html]
 support-files = redundant_font_download.sjs
 [test_rem_unit.html]
 [test_restyles_in_smil_animation.html]
 [test_root_node_display.html]
 [test_rule_insertion.html]
-skip-if = (buildapp == 'b2g' && (toolkit != 'gonk' || debug)) # b2g-debug(monospace and serif text have sufficiently different widths) b2g-desktop(monospace and serif text have sufficiently different widths)
 [test_rule_serialization.html]
 [test_rules_out_of_sheets.html]
 [test_selectors.html]
-skip-if = (toolkit == 'gonk' && debug) || toolkit == 'android' #bug 775227 #debug-only failure; timed out
+skip-if = toolkit == 'android' #bug 775227
 [test_selectors_on_anonymous_content.html]
 [test_setPropertyWithNull.html]
 [test_shorthand_property_getters.html]
 [test_specified_value_serialization.html]
 [test_style_attribute_quirks.html]
 [test_style_attribute_standards.html]
 [test_style_struct_copy_constructors.html]
 [test_supports_rules.html]
@@ -268,17 +262,17 @@ skip-if = (toolkit == 'gonk' && debug) |
 [test_transitions_computed_values.html]
 [test_transitions_computed_value_combinations.html]
 [test_transitions_events.html]
 [test_transitions.html]
 skip-if = (android_version == '18' && debug) # bug 1159532
 [test_transitions_bug537151.html]
 [test_transitions_dynamic_changes.html]
 [test_transitions_per_property.html]
-skip-if = buildapp == 'b2g' || toolkit == 'android' #bug 775227 # b2g(times out, needs more time + various failures) b2g-debug(times out, needs more time + various failures) b2g-desktop(times out, needs more time + various failures)
+skip-if = toolkit == 'android' #bug 775227
 [test_transitions_replacement_on_busy_frame.html]
 support-files = file_transitions_replacement_on_busy_frame.html
 [test_transitions_step_functions.html]
 [test_transitions_with_disabled_properties.html]
 support-files = file_transitions_with_disabled_properties.html
 [test_unclosed_parentheses.html]
 [test_unicode_range_loading.html]
 support-files = ../../reftests/fonts/markA.woff ../../reftests/fonts/markB.woff ../../reftests/fonts/markC.woff ../../reftests/fonts/markD.woff
@@ -286,32 +280,31 @@ support-files = ../../reftests/fonts/mar
 [test_units_frequency.html]
 [test_units_length.html]
 [test_units_time.html]
 [test_unprefixing_service.html]
 support-files = unprefixing_service_iframe.html unprefixing_service_utils.js
 [test_unprefixing_service_prefs.html]
 support-files = unprefixing_service_iframe.html unprefixing_service_utils.js
 [test_value_cloning.html]
-skip-if = toolkit == 'gonk' || toolkit == 'android' #bug 775227, # Bug 1186219 B2G memory explosion
+skip-if = toolkit == 'android' #bug 775227
 [test_value_computation.html]
-skip-if = toolkit == 'gonk' || toolkit == 'android' # Bug 1186219 B2G memory explosion
+skip-if = toolkit == 'android'
 [test_value_storage.html]
-skip-if = toolkit == 'gonk' # Bug 1186219 B2G memory explosion
 [test_variable_serialization_computed.html]
 [test_variable_serialization_specified.html]
 [test_variables.html]
 support-files = support/external-variable-url.css
 [test_video_object_fit.html]
 [test_viewport_units.html]
 [test_visited_image_loading.html]
-skip-if = buildapp == 'b2g' || toolkit == 'android' #TIMED_OUT # b2g(bug 870262, :visited support) b2g-debug(bug 870262, :visited support) b2g-desktop(bug 870262, :visited support)
+skip-if = toolkit == 'android' #TIMED_OUT
 [test_visited_image_loading_empty.html]
-skip-if = buildapp == 'b2g' || toolkit == 'android' #TIMED_OUT # b2g(bug 870262, :visited support) b2g-debug(bug 870262, :visited support) b2g-desktop(bug 870262, :visited support)
+skip-if = toolkit == 'android' #TIMED_OUT
 [test_visited_lying.html]
-skip-if = buildapp == 'b2g' || toolkit == 'android' #TIMED_OUT # b2g(bug 870262, :visited support) b2g-debug(bug 870262, :visited support) b2g-desktop(bug 870262, :visited support)
+skip-if = toolkit == 'android' #TIMED_OUT
 [test_visited_pref.html]
-skip-if = buildapp == 'b2g' || toolkit == 'android' #TIMED_OUT # b2g(bug 870262, :visited support) b2g-debug(bug 870262, :visited support) b2g-desktop(bug 870262, :visited support)
+skip-if = toolkit == 'android' #TIMED_OUT
 [test_visited_reftests.html]
-skip-if = buildapp == 'b2g' || toolkit == 'android' #TIMED_OUT # b2g(bug 870262, :visited support) b2g-debug(bug 870262, :visited support) b2g-desktop(bug 870262, :visited support)
+skip-if = toolkit == 'android' #TIMED_OUT
 [test_webkit_device_pixel_ratio.html]
 [test_webkit_flex_display.html]
 [test_asyncopen2.html]