diff --git a/.github/workflows/linux-full-tests.yml b/.github/workflows/linux-full-tests.yml
index 26f90615fd8..2b6d87203b8 100644
--- a/.github/workflows/linux-full-tests.yml
+++ b/.github/workflows/linux-full-tests.yml
@@ -12,13 +12,11 @@ jobs:
             tag: trusty
             cc: gcc
             cxx: g++
-            cxxflags: "-std=c++11"
           - name: "gcc 5.4 (Boost 1.66)"
             shortname: gcc5
             tag: xenial
             cc: gcc
             cxx: g++
-            cxxflags: "-std=c++11"
           - name: "gcc 6.3 (Boost 1.66)"
             shortname: gcc6
             tag: zesty
@@ -126,7 +124,6 @@ jobs:
             tag: rolling
             cc: gcc
             cxx: g++
-            cxxflags: "-std=c++11"
             configureflags: --enable-std-classes
           - name: "auto_ptr re-enabled"
             shortname: autoptr
diff --git a/.github/workflows/linux-nondefault.yml b/.github/workflows/linux-nondefault.yml
index 256e72b794f..0d3a590ec63 100644
--- a/.github/workflows/linux-nondefault.yml
+++ b/.github/workflows/linux-nondefault.yml
@@ -12,7 +12,6 @@ jobs:
             tag: xenial
             cc: gcc
             cxx: g++
-            cxxflags: "-std=c++11"
           - name: "gcc 6.3 (Boost 1.66)"
             shortname: gcc6
             tag: zesty
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index aebec5ae5f8..d669f20ff0e 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -12,13 +12,11 @@ jobs:
             tag: trusty
             cc: gcc
             cxx: g++
-            cxxflags: "-std=c++11"
           - name: "gcc 5.4 (Boost 1.66)"
             shortname: gcc5
             tag: xenial
             cc: gcc
             cxx: g++
-            cxxflags: "-std=c++11"
           - name: "gcc 6.3 (Boost 1.66)"
             shortname: gcc6
             tag: zesty
@@ -130,7 +128,6 @@ jobs:
             tag: rolling
             cc: gcc
             cxx: g++
-            cxxflags: "-std=c++11"
             configureflags: --enable-std-classes
             tests: true
           - name: "auto_ptr re-enabled"
diff --git a/.github/workflows/macos-nondefault.yml b/.github/workflows/macos-nondefault.yml
index 0a626981dae..2c971045883 100644
--- a/.github/workflows/macos-nondefault.yml
+++ b/.github/workflows/macos-nondefault.yml
@@ -9,7 +9,6 @@ jobs:
         include:
           - os: [macos-10.15]
             shortname: default
-            cxxflags: "-std=c++11"
           - os: [macos-10.15]
             shortname: stdclasses
             cxxflags: "-std=c++17"
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index 1c6d08b5fec..f9538e69815 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -9,10 +9,8 @@ jobs:
         include:
           - os: [macos-10.15]
             shortname: default
-            cxxflags: "-std=c++11"
           - os: [macos-10.15]
             shortname: stdclasses
-            cxxflags: "-std=c++11"
             configureflags: --enable-std-classes
     steps:
     - uses: actions/checkout@v2