diff --git a/.travis.yml b/.travis.yml
index 68e47884..1f5be311 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -97,7 +97,18 @@ matrix:
     - os: linux
       dist: trusty
       compiler: g++-7
-      env: TOOLSET=gcc COMPILER=g++-7 CXXSTD=03,11,14,17
+      env: TOOLSET=gcc COMPILER=g++-7 CXXSTD=03,11
+      addons:
+        apt:
+          packages:
+            - g++-7
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      dist: trusty
+      compiler: g++-7
+      env: TOOLSET=gcc COMPILER=g++-7 CXXSTD=14,17
       addons:
         apt:
           packages:
@@ -108,7 +119,18 @@ matrix:
     - os: linux
       dist: trusty
       compiler: g++-8
-      env: TOOLSET=gcc COMPILER=g++-8 CXXSTD=03,11,14,17
+      env: TOOLSET=gcc COMPILER=g++-8 CXXSTD=03,11
+      addons:
+        apt:
+          packages:
+            - g++-8
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      dist: trusty
+      compiler: g++-8
+      env: TOOLSET=gcc COMPILER=g++-8 CXXSTD=14,17
       addons:
         apt:
           packages: