diff --git a/src/legacy/core_plugins/kibana/server/lib/__tests__/system_api.js b/src/legacy/core_plugins/kibana/server/lib/__tests__/system_api.js
index a63a93f3a70d5..2676087c320b3 100644
--- a/src/legacy/core_plugins/kibana/server/lib/__tests__/system_api.js
+++ b/src/legacy/core_plugins/kibana/server/lib/__tests__/system_api.js
@@ -22,7 +22,16 @@ import { isSystemApiRequest } from '../system_api';
 
 describe('system_api', () => {
   describe('#isSystemApiRequest', () => {
-    it('returns true for a system API HTTP request', () => {
+    it('returns true for a system HTTP request', () => {
+      const mockHapiRequest = {
+        headers: {
+          'kbn-system-request': true,
+        },
+      };
+      expect(isSystemApiRequest(mockHapiRequest)).to.be(true);
+    });
+
+    it('returns true for a legacy system API HTTP request', () => {
       const mockHapiRequest = {
         headers: {
           'kbn-system-api': true,
diff --git a/src/legacy/ui/public/system_api/__tests__/system_api.js b/src/legacy/ui/public/system_api/__tests__/system_api.js
index 822edaa08fdd6..816024f13f8b2 100644
--- a/src/legacy/ui/public/system_api/__tests__/system_api.js
+++ b/src/legacy/ui/public/system_api/__tests__/system_api.js
@@ -31,8 +31,8 @@ describe('system_api', () => {
       };
       const newHeaders = addSystemApiHeader(headers);
 
-      expect(newHeaders).to.have.property('kbn-system-api');
-      expect(newHeaders['kbn-system-api']).to.be(true);
+      expect(newHeaders).to.have.property('kbn-system-request');
+      expect(newHeaders['kbn-system-request']).to.be(true);
 
       expect(newHeaders).to.have.property('kbn-version');
       expect(newHeaders['kbn-version']).to.be('4.6.0');
@@ -40,7 +40,16 @@ describe('system_api', () => {
   });
 
   describe('#isSystemApiRequest', () => {
-    it('returns true for a system API HTTP request', () => {
+    it('returns true for a system HTTP request', () => {
+      const mockRequest = {
+        headers: {
+          'kbn-system-request': true,
+        },
+      };
+      expect(isSystemApiRequest(mockRequest)).to.be(true);
+    });
+
+    it('returns true for a legacy system API HTTP request', () => {
       const mockRequest = {
         headers: {
           'kbn-system-api': true,
diff --git a/x-pack/test/api_integration/apis/security/session.ts b/x-pack/test/api_integration/apis/security/session.ts
index 5d0935bb1ae2d..d819dd38dddb1 100644
--- a/x-pack/test/api_integration/apis/security/session.ts
+++ b/x-pack/test/api_integration/apis/security/session.ts
@@ -28,7 +28,7 @@ export default function({ getService }: FtrProviderContext) {
       supertest
         .get('/internal/security/session')
         .set('kbn-xsrf', 'xxx')
-        .set('kbn-system-api', 'true')
+        .set('kbn-system-request', 'true')
         .set('Cookie', sessionCookie.cookieString())
         .send()
         .expect(200);
diff --git a/x-pack/test/kerberos_api_integration/apis/security/kerberos_login.ts b/x-pack/test/kerberos_api_integration/apis/security/kerberos_login.ts
index 570d7026cf99e..55853f8b0fbde 100644
--- a/x-pack/test/kerberos_api_integration/apis/security/kerberos_login.ts
+++ b/x-pack/test/kerberos_api_integration/apis/security/kerberos_login.ts
@@ -199,7 +199,7 @@ export default function({ getService }: FtrProviderContext) {
         const systemAPIResponse = await supertest
           .get('/internal/security/me')
           .set('kbn-xsrf', 'xxx')
-          .set('kbn-system-api', 'true')
+          .set('kbn-system-request', 'true')
           .set('Cookie', sessionCookie.cookieString())
           .expect(200);
 
diff --git a/x-pack/test/oidc_api_integration/apis/authorization_code_flow/oidc_auth.js b/x-pack/test/oidc_api_integration/apis/authorization_code_flow/oidc_auth.js
index 094537fd61436..abb65e46263ab 100644
--- a/x-pack/test/oidc_api_integration/apis/authorization_code_flow/oidc_auth.js
+++ b/x-pack/test/oidc_api_integration/apis/authorization_code_flow/oidc_auth.js
@@ -285,7 +285,7 @@ export default function({ getService }) {
         const systemAPIResponse = await supertest
           .get('/internal/security/me')
           .set('kbn-xsrf', 'xxx')
-          .set('kbn-system-api', 'true')
+          .set('kbn-system-request', 'true')
           .set('Cookie', sessionCookie.cookieString())
           .expect(200);
 
diff --git a/x-pack/test/saml_api_integration/apis/security/saml_login.ts b/x-pack/test/saml_api_integration/apis/security/saml_login.ts
index 6ede8aadeb5a7..cfbec50557835 100644
--- a/x-pack/test/saml_api_integration/apis/security/saml_login.ts
+++ b/x-pack/test/saml_api_integration/apis/security/saml_login.ts
@@ -330,7 +330,7 @@ export default function({ getService }: FtrProviderContext) {
         const systemAPIResponse = await supertest
           .get('/internal/security/me')
           .set('kbn-xsrf', 'xxx')
-          .set('kbn-system-api', 'true')
+          .set('kbn-system-request', 'true')
           .set('Cookie', sessionCookie.cookieString())
           .expect(200);