diff --git a/.travis.yml b/.travis.yml
index a888e72..c6143fb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -81,6 +81,25 @@ matrix:
           sources:
             - ubuntu-toolchain-r-test
 
+    - os: linux
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++11
+      addons:
+        apt:
+          packages:
+            - g++-6
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      env: TOOLSET=clang COMPILER=clang++-3.5 CXXSTD=c++11
+      addons:
+        apt:
+          packages:
+            - clang-3.5
+          sources:
+            - ubuntu-toolchain-r-test
+            - llvm-toolchain-precise-3.5
+
     - os: linux
       env: TOOLSET=clang COMPILER=clang++-3.6 CXXSTD=c++11
       addons:
@@ -131,6 +150,36 @@ matrix:
             - ubuntu-toolchain-r-test
             - llvm-toolchain-precise-3.8
 
+    - 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++11