--- a/toolkit/components/search/tests/xpcshell/data/engines.json
+++ b/toolkit/components/search/tests/xpcshell/data/engines.json
@@ -1,82 +1,76 @@
 {
   "data": [
     {
-      "engineName": "engine",
       "webExtension": {
         "id": "engine@search.mozilla.org",
         "version": "1.0"
       },
       "orderHint": 10000,
       "appliesTo": [{
         "included": { "everywhere": true },
         "default": "yes"
       }]
     },
     {
-      "engineName": "engine-pref",
       "webExtension": {
         "id": "engine-pref@search.mozilla.org",
         "version": "1.0"
       },
       "orderHint": 7000,
       "appliesTo": [{
         "included": { "everywhere": true },
         "excluded": { "locales": { "matches": ["de"] } },
         "default": "no",
         "defaultPrivate": "yes"
       }]
     },
     {
-      "engineName": "engine-rel-searchform-purpose",
       "webExtension": {
         "id": "engine-rel-searchform-purpose@search.mozilla.org",
         "version": "1.0"
       },
       "orderHint": 6000,
       "appliesTo": [{
         "included": { "everywhere": true },
         "excluded": { "locales": { "matches": ["de", "fr"] } },
         "default": "no"
       }]
     },
     {
-      "engineName": "engine-chromeicon",
       "webExtension": {
         "id": "engine-chromeicon@search.mozilla.org",
         "version": "1.0"
       },
       "orderHint": 8000,
       "appliesTo": [{
         "included": { "everywhere": true },
         "excluded": { "locales": { "matches": ["de", "fr"] } },
         "default": "no"
       }, {
         "included": { "regions": ["ru"] },
         "default": "no"
       }]
     },
     {
-      "engineName": "engine-resourceicon",
       "webExtension": {
         "id": "engine-resourceicon@search.mozilla.org",
         "version": "1.0"
       },
       "orderHint": 9000,
       "appliesTo": [{
         "included": { "locales": { "matches": ["en-US", "fr"] } },
         "excluded": {
           "regions": ["ru"]
         },
         "default": "no"
       }]
     },
     {
-      "engineName": "engine-reordered",
       "webExtension": {
         "id": "engine-reordered@search.mozilla.org",
         "version": "1.0"
       },
       "orderHint": 5000,
       "appliesTo": [{
         "included": { "everywhere": true },
         "excluded": { "locales": { "matches": ["de", "fr"] } },

--- a/toolkit/components/search/tests/xpcshell/data1/engines.json
+++ b/toolkit/components/search/tests/xpcshell/data1/engines.json
@@ -1,24 +1,22 @@
 {
   "data": [
     {
-      "engineName": "engine1",
       "webExtension": {
         "id": "engine1@search.mozilla.org",
         "version": "1.0"
       },
       "orderHint": 10000,
       "appliesTo": [{
         "included": { "everywhere": true },
         "default": "yes"
       }]
     },
     {
-      "engineName": "engine2",
       "webExtension": {
         "id": "engine2@search.mozilla.org",
         "version": "1.0"
       },
       "orderHint": 7000,
       "appliesTo": [{
         "included": { "everywhere": true },
         "default": "no"

--- a/toolkit/components/search/tests/xpcshell/simple-engines/engines.json
+++ b/toolkit/components/search/tests/xpcshell/simple-engines/engines.json
@@ -1,12 +1,11 @@
 {
   "data": [
     {
-      "engineName": "basic",
       "webExtension": {
         "id":"basic@search.mozilla.org",
         "version": "1.0"
       },
       "appliesTo": [{
         "included": { "everywhere": true },
         "default": "yes"
       }]

--- a/toolkit/components/search/tests/xpcshell/test-extensions/engines.json
+++ b/toolkit/components/search/tests/xpcshell/test-extensions/engines.json
@@ -1,35 +1,32 @@
 {
   "data": [
     {
-      "engineName": "plainengine",
       "webExtension": {
         "id": "plainengine@search.mozilla.org",
         "version": "1.0"
       },
       "orderHint": 10000,
       "appliesTo": [{
         "included": { "everywhere": true },
         "default": "yes"
       }]
     },
     {
-      "engineName": "special-engine",
       "webExtension": {
         "id": "special-engine@search.mozilla.org",
         "version": "1.0"
       },
       "orderHint": 7000,
       "appliesTo": [{
         "included": { "everywhere": true }
       }]
     },
     {
-      "engineName": "multilocale-an",
       "webExtension": {
         "id": "multilocale@search.mozilla.org",
         "version": "1.0",
         "locales": ["an"]
       },
       "orderHint": 6000,
       "appliesTo": [{
         "included": { "regions": ["an"] }