dotent also times out

.travis.yml

@@ -90,7 +90,19 @@ matrix:
        - GROUP=ALL
     - os: osx
       osx_image: xcode8.2
-      env: TARGET=dotnet
+      env:
+        - TARGET=dotnet
+        - GROUP=LEXER
+    - os: osx
+      osx_image: xcode8.2
+      env:
+        - TARGET=dotnet
+        - GROUP=PARSER
+    - os: osx
+      osx_image: xcode8.2
+      env:
+        - TARGET=dotnet
+        - GROUP=RECURSION
     - os: linux
       jdk: oraclejdk7
       env: TARGET=java
@@ -103,7 +115,21 @@ matrix:
     - os: linux
       jdk: oraclejdk8
       dist: trusty
-      env: TARGET=dotnet
+      env:
+        - TARGET=dotnet
+        - GROUP=LEXER
+    - os: linux
+      jdk: oraclejdk8
+      dist: trusty
+      env:
+        - TARGET=dotnet
+        - GROUP=PARSER
+    - os: linux
+      jdk: oraclejdk8
+      dist: trusty
+      env:
+        - TARGET=dotnet
+        - GROUP=RECURSION
     - os: linux
       jdk: oraclejdk7
       env: TARGET=python2

.travis/run-tests-dotnet.sh

@@ -8,5 +8,12 @@ dotnet build -c Release ../runtime/CSharp/runtime/CSharp/Antlr4.Runtime/Antlr4.R
 
 # call test
 
-mvn -q -Dparallel=classes -DthreadCount=4 -Dtest=csharp.* -Dantlr-csharp-netstandard=true test
-
+if [ $GROUP == "LEXER" ]; then
+    mvn -q -Dgroups="org.antlr.v4.test.runtime.category.LexerTests" -Dparallel=classes -DthreadCount=4 -Dtest=csharp.* -Dantlr-csharp-netstandard=true test
+elif [ $GROUP == "PARSER" ]; then
+    mvn -q -Dgroups="org.antlr.v4.test.runtime.category.ParserTests" -Dparallel=classes -DthreadCount=4 -Dtest=csharp.* -Dantlr-csharp-netstandard=true test
+elif [ $GROUP == "RECURSION" ]; then
+    mvn -q -Dgroups="org.antlr.v4.test.runtime.category.LeftRecursionTests" -Dparallel=classes -DthreadCount=4 -Dtest=csharp.* -Dantlr-csharp-netstandard=true test
+else
+    mvn -q -Dparallel=classes -DthreadCount=4 -Dtest=csharp.* -Dantlr-csharp-netstandard=true test
+fi