Skipping tests that can't be run on external server.

test/nbrowser/ReferenceColumns.ts

@@ -70,6 +70,9 @@ describe('ReferenceColumns', function() {
     });
 
     it('should allow entering numeric id before target table is loaded', async function() {
+      if (server.isExternalServer()) {
+        this.skip();
+      }
       // Refresh the document.
       await driver.navigate().refresh();
       await gu.waitForDocToLoad();

test/nbrowser/ReferenceList.ts

@@ -298,6 +298,9 @@ describe('ReferenceList', function() {
     });
 
     it('should allow entering numeric id before target table is loaded', async function() {
+      if (server.isExternalServer()) {
+        this.skip();
+      }
       // Refresh the document.
       await driver.navigate().refresh();
       await gu.waitForDocToLoad();

test/nbrowser/testServer.ts

@@ -176,6 +176,9 @@ export class TestServerMerged implements IMochaServer {
    * request takes a long time.
    */
   public async pauseUntil(callback: () => Promise<void>) {
+    if (this.isExternalServer()) {
+      throw new Error("Can't pause external server");
+    }
     log.info("Pausing node server");
     this._server.kill('SIGSTOP');
     try {

test/test_under_docker.sh

@@ -64,4 +64,4 @@ TEST_ADD_SAMPLES=1 TEST_ACCOUNT_PASSWORD=not-needed \
   GRIST_SESSION_COOKIE=grist_test_cookie \
   GRIST_TEST_LOGIN=1 \
   NODE_PATH=_build:_build/stubs \
-  $MOCHA _build/test/nbrowser/*.js "$@"
+  $MOCHA _build/test/nbrowser/*.js -g ${GREP_TESTS:-''} "$@"