diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 180e2973..be0191cc 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -46,6 +46,15 @@ jobs:
     - template: .ci/azure-build.yml
     - template: .ci/azure-test.yml
 
+- job: Clang11
+  pool:
+    vmImage: 'macOS-latest'
+  variables:
+    cli11.std: 11
+  steps:
+    - template: .ci/azure-build.yml
+    - template: .ci/azure-test.yml
+
 - job: Meson
   pool:
     vmImage: 'ubuntu-latest'
diff --git a/tests/TransformTest.cpp b/tests/TransformTest.cpp
index a3058e75..48a9cb32 100644
--- a/tests/TransformTest.cpp
+++ b/tests/TransformTest.cpp
@@ -199,6 +199,7 @@ TEST_F(TApp, SimpleNumericalTransformFnArray) {
     EXPECT_EQ(value, 1);
 }
 
+#ifdef CLI11_CPP14
 // zero copy constexpr array operation with transformer example and test
 TEST_F(TApp, SimpleNumericalTransformFnconstexprArray) {
     constexpr std::pair<const char *, int> p1{"one", 1};
@@ -219,6 +220,7 @@ TEST_F(TApp, SimpleNumericalTransformFnconstexprArray) {
     EXPECT_EQ(1u, opt->count());
     EXPECT_EQ(value, 2);
 }
+#endif
 
 TEST_F(TApp, EnumTransformFn) {
     enum class test : int16_t { val1 = 3, val2 = 4, val3 = 17 };