diff --git a/tests/CTS/requests/composition/multipleBatch.json b/tests/CTS/requests/composition/multipleBatch.json
index 1f620e46fab..8766b91a553 100644
--- a/tests/CTS/requests/composition/multipleBatch.json
+++ b/tests/CTS/requests/composition/multipleBatch.json
@@ -81,7 +81,7 @@
                 },
                 "injectedItems": [
                   {
-                    "key": "injectedItem1",
+                    "key": "my-unique-external-group-key",
                     "source": {
                       "external": {
                         "index": "foo",
@@ -122,7 +122,7 @@
                   },
                   "injectedItems": [
                     {
-                      "key": "injectedItem1",
+                      "key": "my-unique-external-group-key",
                       "source": {
                         "external": {
                           "index": "foo",
@@ -167,7 +167,7 @@
                 },
                 "injectedItems": [
                   {
-                    "key": "injectedItem1",
+                    "key": "my-unique-group-key",
                     "source": {
                       "search": {
                         "index": "foo",
@@ -193,7 +193,7 @@
                     }
                   },
                   {
-                    "key": "externalItem",
+                    "key": "my-unique-group-key",
                     "source": {
                       "search": {
                         "index": "foo",
@@ -249,7 +249,7 @@
                   },
                   "injectedItems": [
                     {
-                      "key": "injectedItem1",
+                      "key": "my-unique-group-key",
                       "source": {
                         "search": {
                           "index": "foo",
@@ -275,7 +275,7 @@
                       }
                     },
                     {
-                      "key": "externalItem",
+                      "key": "my-unique-group-key",
                       "source": {
                         "search": {
                           "index": "foo",
diff --git a/tests/CTS/requests/composition/putComposition.json b/tests/CTS/requests/composition/putComposition.json
index e95672ab842..056f6eb1f55 100644
--- a/tests/CTS/requests/composition/putComposition.json
+++ b/tests/CTS/requests/composition/putComposition.json
@@ -16,7 +16,7 @@
             },
             "injectedItems": [
               {
-                "key": "injectedItem1",
+                "key": "my-unique-group-key",
                 "source": {
                   "search": {
                     "index": "foo"
@@ -47,7 +47,7 @@
             },
             "injectedItems": [
               {
-                "key": "injectedItem1",
+                "key": "my-unique-group-key",
                 "source": {
                   "search": {
                     "index": "foo"
@@ -79,7 +79,7 @@
             },
             "injectedItems": [
               {
-                "key": "injectedItem1",
+                "key": "my-unique-external-group-key",
                 "source": {
                   "external": {
                     "index": "foo",
@@ -114,7 +114,7 @@
             },
             "injectedItems": [
               {
-                "key": "injectedItem1",
+                "key": "my-unique-external-group-key",
                 "source": {
                   "external": {
                     "index": "foo",
@@ -154,7 +154,7 @@
             },
             "injectedItems": [
               {
-                "key": "injectedItem1",
+                "key": "my-unique-group-key",
                 "source": {
                   "search": {
                     "index": "foo",
@@ -180,7 +180,7 @@
                 }
               },
               {
-                "key": "externalItem",
+                "key": "my-unique-group-key",
                 "source": {
                   "search": {
                     "index": "foo",
@@ -230,7 +230,7 @@
             },
             "injectedItems": [
               {
-                "key": "injectedItem1",
+                "key": "my-unique-group-key",
                 "source": {
                   "search": {
                     "index": "foo",
@@ -256,7 +256,7 @@
                 }
               },
               {
-                "key": "externalItem",
+                "key": "my-unique-group-key",
                 "source": {
                   "search": {
                     "index": "foo",
diff --git a/tests/CTS/requests/composition/putCompositionRule.json b/tests/CTS/requests/composition/putCompositionRule.json
index 42c96f71900..a37d507581d 100644
--- a/tests/CTS/requests/composition/putCompositionRule.json
+++ b/tests/CTS/requests/composition/putCompositionRule.json
@@ -23,7 +23,7 @@
               },
               "injectedItems": [
                 {
-                  "key": "injectedItem1",
+                  "key": "my-unique-group-from-rule-key",
                   "source": {
                     "search": {
                       "index": "foo"
@@ -61,7 +61,7 @@
               },
               "injectedItems": [
                 {
-                  "key": "injectedItem1",
+                  "key": "my-unique-group-from-rule-key",
                   "source": {
                     "search": {
                       "index": "foo"
@@ -102,7 +102,7 @@
               },
               "injectedItems": [
                 {
-                  "key": "injectedItem1",
+                  "key": "my-unique-group-from-rule-key",
                   "source": {
                     "search": {
                       "index": "foo",
@@ -156,7 +156,7 @@
               },
               "injectedItems": [
                 {
-                  "key": "injectedItem1",
+                  "key": "my-unique-group-from-rule-key",
                   "source": {
                     "search": {
                       "index": "foo",
@@ -228,7 +228,7 @@
               },
               "injectedItems": [
                 {
-                  "key": "injectedItem",
+                  "key": "my-unique-external-group-from-rule-key",
                   "source": {
                     "external": {
                       "index": "my-index",
@@ -286,7 +286,7 @@
               },
               "injectedItems": [
                 {
-                  "key": "injectedItem",
+                  "key": "my-unique-external-group-from-rule-key",
                   "source": {
                     "external": {
                       "index": "my-index",
diff --git a/tests/CTS/requests/composition/saveRules.json b/tests/CTS/requests/composition/saveRules.json
index c525a5dcb04..68b4c5bd5f7 100644
--- a/tests/CTS/requests/composition/saveRules.json
+++ b/tests/CTS/requests/composition/saveRules.json
@@ -92,7 +92,7 @@
                     },
                     "injectedItems": [
                       {
-                        "key": "injectedItem1",
+                        "key": "my-unique-group-from-rule-key",
                         "source": {
                           "search": {
                             "index": "foo",
@@ -153,7 +153,7 @@
                     },
                     "injectedItems": [
                       {
-                        "key": "injectedItem1",
+                        "key": "my-unique-group-from-rule-key",
                         "source": {
                           "search": {
                             "index": "foo",
@@ -231,7 +231,7 @@
                     },
                     "injectedItems": [
                       {
-                        "key": "injectedItem",
+                        "key": "my-unique-external-group-from-rule-key",
                         "source": {
                           "external": {
                             "index": "my-index",
@@ -296,7 +296,7 @@
                     },
                     "injectedItems": [
                       {
-                        "key": "injectedItem",
+                        "key": "my-unique-external-group-from-rule-key",
                         "source": {
                           "external": {
                             "index": "my-index",
diff --git a/tests/CTS/requests/composition/search.json b/tests/CTS/requests/composition/search.json
index 1ec4e088a3d..a74b47f4067 100644
--- a/tests/CTS/requests/composition/search.json
+++ b/tests/CTS/requests/composition/search.json
@@ -28,7 +28,7 @@
         "params": {
           "query": "batman",
           "injectedItems": {
-            "injectedItem1": {
+            "my-unique-external-group-key": {
               "items": [
                 {
                   "objectID": "my-object-1"
@@ -57,7 +57,7 @@
         "params": {
           "query": "batman",
           "injectedItems": {
-            "injectedItem1": {
+            "my-unique-external-group-key": {
               "items": [
                 {
                   "objectID": "my-object-1"