diff --git a/.travis.yml b/.travis.yml
index 14fe66ac1..e4e1a3440 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,6 +16,7 @@ addons:
     - cmake
     - libpython-dev python-numpy
     - libboost-all-dev
+    - libtbb-dev
 
 # before_install:
 #  - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew update          ; fi
@@ -43,7 +44,7 @@ jobs:
   - stage: compile
     os: osx
     compiler: gcc
-    env: CMAKE_BUILD_TYPE=Debug GTSAM_BUILD_UNSTABLE=OFF
+    env: CMAKE_BUILD_TYPE=Debug GTSAM_BUILD_UNSTABLE=OFF GTSAM_WITH_TBB=OFF
     script: bash .travis.sh -b
   - stage: compile
     os: osx
@@ -54,7 +55,7 @@ jobs:
   - stage: compile
     os: osx
     compiler: clang
-    env: CMAKE_BUILD_TYPE=Debug GTSAM_BUILD_UNSTABLE=OFF
+    env: CMAKE_BUILD_TYPE=Debug GTSAM_BUILD_UNSTABLE=OFF GTSAM_WITH_TBB=OFF
     script: bash .travis.sh -b
   - stage: compile
     os: osx
@@ -65,7 +66,7 @@ jobs:
   - stage: compile
     os: linux
     compiler: gcc
-    env: CMAKE_BUILD_TYPE=Debug GTSAM_BUILD_UNSTABLE=OFF
+    env: CMAKE_BUILD_TYPE=Debug GTSAM_BUILD_UNSTABLE=OFF GTSAM_WITH_TBB=OFF
     script: bash .travis.sh -b
   - stage: compile
     os: linux
@@ -76,7 +77,7 @@ jobs:
   - stage: compile
     os: linux
     compiler: clang
-    env: CC=clang-9 CXX=clang++-9 CMAKE_BUILD_TYPE=Debug GTSAM_BUILD_UNSTABLE=OFF
+    env: CC=clang-9 CXX=clang++-9 CMAKE_BUILD_TYPE=Debug GTSAM_BUILD_UNSTABLE=OFF GTSAM_WITH_TBB=OFF
     script: bash .travis.sh -b
   - stage: compile
     os: linux
@@ -87,7 +88,13 @@ jobs:
   - stage: special
     os: linux
     compiler: clang
-    env: CC=clang-9 CXX=clang++-9 CMAKE_BUILD_TYPE=Debug GTSAM_BUILD_UNSTABLE=OFF GTSAM_ALLOW_DEPRECATED_SINCE_V4=ON
+    env: CC=clang-9 CXX=clang++-9 CMAKE_BUILD_TYPE=Debug GTSAM_BUILD_UNSTABLE=OFF GTSAM_ALLOW_DEPRECATED_SINCE_V4=ON GTSAM_WITH_TBB=OFF
+    script: bash .travis.sh -b
+# on Linux, with GTSAM_WITH_TBB not off to make sure GTSAM still compiles/tests
+  - stage: special
+    os: linux
+    compiler: gcc
+    env: CMAKE_BUILD_TYPE=Debug GTSAM_BUILD_UNSTABLE=OFF
     script: bash .travis.sh -b
 # -------- STAGE 2: TESTS -----------
 # on Mac, GCC
@@ -99,7 +106,7 @@ jobs:
   - stage: test
     os: osx
     compiler: clang
-    env: CMAKE_BUILD_TYPE=Debug GTSAM_BUILD_UNSTABLE=OFF
+    env: CMAKE_BUILD_TYPE=Debug GTSAM_BUILD_UNSTABLE=OFF GTSAM_WITH_TBB=OFF
     script: bash .travis.sh -t
   - stage: test
     os: linux
@@ -109,7 +116,7 @@ jobs:
   - stage: test
     os: linux
     compiler: gcc
-    env: CMAKE_BUILD_TYPE=Debug GTSAM_BUILD_UNSTABLE=OFF
+    env: CMAKE_BUILD_TYPE=Debug GTSAM_BUILD_UNSTABLE=OFF GTSAM_WITH_TBB=OFF
     script: bash .travis.sh -t
   - stage: test
     os: linux