diff --git a/.travis.yml b/.travis.yml
index 43c34382..e66fed4d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -54,59 +54,37 @@ addons: &clang10
 
 matrix:
   include:
-    # Test gcc-4.8: C++11, Build=Debug/Release
-    - env: GCC_VERSION=4.8 BUILD_TYPE=Debug CPP=11
-      os: linux
-      addons: *gcc48
+    # Test gcc-4.8: C++11, Build=Release
     - env: GCC_VERSION=4.8 BUILD_TYPE=Release CPP=11
       os: linux
       addons: *gcc48
       
-    # Test gcc-7: C++11, Build=Debug/Release
-    - env: GCC_VERSION=7 BUILD_TYPE=Debug CPP=11
-      os: linux
-      addons: *gcc7
+    # Test gcc-7: C++11, Build=Release
     - env: GCC_VERSION=7 BUILD_TYPE=Release CPP=11
       os: linux
       addons: *gcc7
       
-       # Test gcc-9: C++17, Build=Debug/Release
-    - env: GCC_VERSION=9 BUILD_TYPE=Debug CPP=17
-      os: linux
-      addons: *gcc9
+     # Test gcc-9: C++17, Build=Release
     - env: GCC_VERSION=9 BUILD_TYPE=Release CPP=17
       os: linux
       addons: *gcc9
 
-    # Test clang-3.5: C++11, Build=Debug/Release
-    - env: CLANG_VERSION=3.5 BUILD_TYPE=Debug CPP=11
-      os: linux
-      addons: *clang35
-
+    # Test clang-3.5: C++11, Build=Release
     - env: CLANG_VERSION=3.5 BUILD_TYPE=Release CPP=11
       os: linux
       addons: *clang35
 
-      # osx
+    # Text osx
     - env: BUILD_TYPE=Release CPP=11 ASAN=Off TSAN=Off
       os: osx
 
-    # Test clang-10.0: C++11, Build=Debug/Release
-    - env: CLANG_VERSION=10 BUILD_TYPE=Debug CPP=11
-      os: linux
-      dist: bionic
-      addons: *clang10
-
+    # Test clang-10.0: C++11, Build=Release
     - env: CLANG_VERSION=10 BUILD_TYPE=Release CPP=11 ASAN=On
       os: linux
       dist: bionic
       addons: *clang10
       
-    # Test clang-10.0: C++17, Build=Debug/Release
-    - env: CLANG_VERSION=10 BUILD_TYPE=Release CPP=17 ASAN=Off
-      os: linux
-      dist: bionic
-      addons: *clang10
+    # Test clang-10.0: C++17, Build=Debug
     - env: CLANG_VERSION=10 BUILD_TYPE=Debug CPP=17 ASAN=Off
       os: linux
       dist: bionic