diff --git a/.travis.yml b/.travis.yml
index 0bd1e83..15d9318 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -229,6 +229,46 @@ matrix:
     - name: Clang-7 C++17 Release
       env: CXX=clang++ BUILD_TYPE=Release GSL_CXX_STANDARD=17
 
+    # Clang 8
+    - name: Clang-8 C++14 Debug
+      env: CXX=clang++-8 BUILD_TYPE=Debug GSL_CXX_STANDARD=14
+      addons: &clang8
+        apt:
+          sources:
+          - sourceline: 'deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-8 main'
+            key_url: https://apt.llvm.org/llvm-snapshot.gpg.key
+          packages:
+          - clang-8
+    - name: Clang-8 C++14 Release
+      env: CXX=clang++-8 BUILD_TYPE=Release GSL_CXX_STANDARD=14
+      addons: *clang8
+    - name: Clang-8 C++17 Debug
+      env: CXX=clang++-8 BUILD_TYPE=Debug GSL_CXX_STANDARD=17
+      addons: *clang8
+    - name: Clang-8 C++17 Release
+      env: CXX=clang++-8 BUILD_TYPE=Release GSL_CXX_STANDARD=17
+      addons: *clang8
+
+    # Clang 9
+    - name: Clang-9 C++14 Debug
+      env: CXX=clang++-9 BUILD_TYPE=Debug GSL_CXX_STANDARD=14
+      addons: &clang9
+        apt:
+          sources:
+          - sourceline: 'deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-9 main'
+            key_url: https://apt.llvm.org/llvm-snapshot.gpg.key
+          packages:
+          - clang-9
+    - name: Clang-9 C++14 Release
+      env: CXX=clang++-9 BUILD_TYPE=Release GSL_CXX_STANDARD=14
+      addons: *clang9
+    - name: Clang-9 C++17 Debug
+      env: CXX=clang++-9 BUILD_TYPE=Debug GSL_CXX_STANDARD=17
+      addons: *clang9
+    - name: Clang-9 C++17 Release
+      env: CXX=clang++-9 BUILD_TYPE=Release GSL_CXX_STANDARD=17
+      addons: *clang9
+
     ##########################################################################
     # GCC on Linux
     ##########################################################################