diff --git a/.travis.yml b/.travis.yml
index 7b5505b..84089a4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -231,6 +231,46 @@ matrix:
             - ubuntu-toolchain-r-test
             - llvm-toolchain-precise-3.8
 
+    - os: linux
+      env: TOOLSET=clang COMPILER=clang++-3.9 CXXSTD=c++03
+      addons:
+        apt:
+          packages:
+            - clang-3.9
+          sources:
+            - ubuntu-toolchain-r-test
+            - llvm-toolchain-precise-3.9
+
+    - os: linux
+      env: TOOLSET=clang COMPILER=clang++-3.9 CXXSTD=c++11
+      addons:
+        apt:
+          packages:
+            - clang-3.9
+          sources:
+            - ubuntu-toolchain-r-test
+            - llvm-toolchain-precise-3.9
+
+    - os: linux
+      env: TOOLSET=clang COMPILER=clang++-3.9 CXXSTD=c++14
+      addons:
+        apt:
+          packages:
+            - clang-3.9
+          sources:
+            - ubuntu-toolchain-r-test
+            - llvm-toolchain-precise-3.9
+
+    - os: linux
+      env: TOOLSET=clang COMPILER=clang++-3.9 CXXSTD=c++1z
+      addons:
+        apt:
+          packages:
+            - clang-3.9
+          sources:
+            - ubuntu-toolchain-r-test
+            - llvm-toolchain-precise-3.9
+
     - os: osx
       env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++03
 
@@ -240,6 +280,9 @@ matrix:
     - os: osx
       env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++14
 
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++1z
+
 install:
   - cd ..
   - git clone -b $TRAVIS_BRANCH https://github.com/boostorg/boost.git boost-root