diff --git a/.circleci/config.yml b/.circleci/config.yml
index 7d9cc9778..9e4250516 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -136,6 +136,24 @@ jobs:
           command: |
             test/externalTests/zeppelin.sh /tmp/workspace/soljson.js || test/externalTests/zeppelin.sh /tmp/workspace/soljson.js
 
+  test_emscripten_external_colony:
+    docker:
+      - image: circleci/node:10
+    environment:
+      TERM: xterm
+    steps:
+      - checkout
+      - attach_workspace:
+          at: /tmp/workspace
+      - run:
+          name: Install test dependencies
+          command: |
+            sudo apt-get -qy install lsof
+      - run:
+          name: External ColonyNetworks tests
+          command: |
+            test/externalTests/colony.sh /tmp/workspace/soljson.js || test/externalTests/colony.sh /tmp/workspace/soljson.js
+
   build_x86_linux:
     docker:
       - image: buildpack-deps:bionic
@@ -473,14 +491,6 @@ workflows:
           <<: *build_on_tags
           requires:
             - build_emscripten
-      - test_emscripten_external_zeppelin:
-          <<: *build_on_tags
-          requires:
-            - build_emscripten
-      - test_emscripten_external_gnosis:
-          <<: *build_on_tags
-          requires:
-            - build_emscripten
       - build_x86_linux: *build_on_tags
       - build_x86_linux_cxx17: *build_on_tags
       - build_x86_clang7_asan: *build_on_tags
@@ -523,8 +533,13 @@ workflows:
           <<: *build_on_tags
           requires:
             - build_emscripten
+      - test_emscripten_external_colony:
+          <<: *build_on_tags
+          requires:
+            - build_emscripten
       - build_x86_linux_ossfuzz: *build_on_tags
       - test_x86_ossfuzz_regression:
           <<: *build_on_tags
           requires:
             - build_x86_linux_ossfuzz
+
diff --git a/test/externalTests/colony.sh b/test/externalTests/colony.sh
new file mode 100755
index 000000000..9745d10ce
--- /dev/null
+++ b/test/externalTests/colony.sh
@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+
+# ------------------------------------------------------------------------------
+# This file is part of solidity.
+#
+# solidity is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# solidity is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with solidity.  If not, see <http://www.gnu.org/licenses/>
+#
+# (c) 2019 solidity contributors.
+#------------------------------------------------------------------------------
+source test/externalTests/common.sh
+
+verify_input "$1"
+SOLJSON="$1"
+
+function install_fn { yarn; git submodule update --init; }
+function compile_fn { yarn run provision:token:contracts; }
+function test_fn { yarn run test:contracts; }
+
+function colony_test
+{
+    OPTIMIZER_LEVEL=3
+    FORCE_ABIv2=false
+    setup https://github.com/JoinColony/colonyNetwork.git develop master
+    run_install install_fn
+
+    CONFIG=$(find_truffle_config)
+
+    cd lib
+    rm -Rf dappsys
+    git clone https://github.com/erak/dappsys-monolithic.git -b callvalue-payable-fix dappsys
+    cd ..
+
+    run_test compile_fn test_fn
+}
+
+external_test ColonyNetworks colony_test
diff --git a/test/externalTests/common.sh b/test/externalTests/common.sh
index 039e4e2d6..ebcdaa9a8 100644
--- a/test/externalTests/common.sh
+++ b/test/externalTests/common.sh
@@ -218,7 +218,9 @@ function run_test
         clean
         force_solc_settings "$CONFIG" "$optimize" "petersburg"
         # Force ABIEncoderV2 in the last step. Has to be the last because code is modified.
-        [[ "$optimize" =~ yul ]] && force_abi_v2
+        if [ "$FORCE_ABIv2" = true ]; then
+            [[ "$optimize" =~ yul ]] && force_abi_v2
+        fi
 
         printLog "Running compile function..."
         $compile_fn