diff --git a/.travis.yml b/.travis.yml
index e775d7b..32e4eaa 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -26,6 +26,7 @@ env:
     - CXX_STANDARD=c++98 BRANCH_TO_TEST=boost-1.59.0
     - CXX_STANDARD=c++11 BRANCH_TO_TEST=boost-1.67.0
     - CXX_STANDARD=c++98 BRANCH_TO_TEST=boost-1.67.0
+    - CXX_STANDARD=c++17 BRANCH_TO_TEST=boost-1.70.0
 
 compiler:
   - clang
diff --git a/appveyor.yml b/appveyor.yml
index f20a17e..8892604 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -23,7 +23,10 @@ environment:
       BOOST: 1_67_0
       TOOLSET: msvc-14.1
       CXX_STANDARD: 14
-      # CXX_STANDARD: 17
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019 Preview
+      BOOST: 1_69_0
+      TOOLSET: msvc-14.2
+      CXX_STANDARD: 17
 
 platform:
   - 32