diff --git a/components/app/lib/call_platform/fake_client.rb b/components/app/lib/call_platform/fake_client.rb
index ed5f43084..7b6456e54 100644
--- a/components/app/lib/call_platform/fake_client.rb
+++ b/components/app/lib/call_platform/fake_client.rb
@@ -21,7 +21,8 @@ def create_call(params)
         direction: "inbound",
         to: params.fetch(:to),
         from: params.fetch(:from),
-        api_version: "2010-04-01"
+        api_version: "2010-04-01",
+        default_tts_voice: "Basic.Kal"
       )
     end
 
diff --git a/components/testing/tests/client_gateway/outbound_proxy_test.sh b/components/testing/tests/client_gateway/outbound_proxy_test.sh
index 1cf65d614..018b7b5a8 100755
--- a/components/testing/tests/client_gateway/outbound_proxy_test.sh
+++ b/components/testing/tests/client_gateway/outbound_proxy_test.sh
@@ -31,6 +31,7 @@ curl -s -o /dev/null -XPOST -u "adhearsion:password" http://switch-app:8080/call
   "account_auth_token": "sample-auth-token",
   "direction": "outbound-api",
   "api_version": "2010-04-01",
+  "default_tts_voice" => "Basic.Kal",
   "routing_parameters": {
     "destination": "85512334667",
     "dial_string_prefix": null,
diff --git a/components/testing/tests/client_gateway/outbound_uas_behind_nat_test.sh b/components/testing/tests/client_gateway/outbound_uas_behind_nat_test.sh
index 40cc6e8e5..2eaa577a0 100755
--- a/components/testing/tests/client_gateway/outbound_uas_behind_nat_test.sh
+++ b/components/testing/tests/client_gateway/outbound_uas_behind_nat_test.sh
@@ -30,6 +30,7 @@ curl -s -o /dev/null -XPOST -u "adhearsion:password" http://switch-app:8080/call
   "account_auth_token": "sample-auth-token",
   "direction": "outbound-api",
   "api_version": "2010-04-01",
+  "default_tts_voice" => "Basic.Kal",
   "routing_parameters": {
     "destination": "85512334667",
     "dial_string_prefix": null,
diff --git a/components/testing/tests/public_gateway/alternative_outbound_test.sh b/components/testing/tests/public_gateway/alternative_outbound_test.sh
index 0422c4c6a..579a61326 100755
--- a/components/testing/tests/public_gateway/alternative_outbound_test.sh
+++ b/components/testing/tests/public_gateway/alternative_outbound_test.sh
@@ -22,6 +22,7 @@ curl -s -o /dev/null -XPOST -u "adhearsion:password" http://switch-app:8080/call
   "account_auth_token": "sample-auth-token",
   "direction": "outbound-api",
   "api_version": "2010-04-01",
+  "default_tts_voice" => "Basic.Kal",
   "routing_parameters": {
     "destination": "85512334667",
     "dial_string_prefix": null,
diff --git a/components/testing/tests/public_gateway/outbound_test.sh b/components/testing/tests/public_gateway/outbound_test.sh
index a3434d55c..2f0a54770 100755
--- a/components/testing/tests/public_gateway/outbound_test.sh
+++ b/components/testing/tests/public_gateway/outbound_test.sh
@@ -24,6 +24,7 @@ curl -s -o /dev/null -XPOST -u "adhearsion:password" http://switch-app:8080/call
   "account_auth_token": "sample-auth-token",
   "direction": "outbound-api",
   "api_version": "2010-04-01",
+  "default_tts_voice" => "Basic.Kal",
   "routing_parameters": {
     "destination": "85512334667",
     "dial_string_prefix": null,