diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index a8207a72f..26d1d5cdb 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -9,7 +9,7 @@ on:
 jobs:
   # Deploy release
   deploy:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     container: johnmcfarlane/cnl_ci:gcc-10
     env:
       GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d60a3acc1..386f35fd3 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,6 +10,7 @@ on:
 jobs:
   # Build and test many combinations on Linux/OS X using Conan
   clang-tidy:
+    if: false
     strategy:
       matrix:
         int128: ["True", "False"]
@@ -225,6 +226,7 @@ jobs:
 
   # Build and test on Windows using Conan
   windows:
+    if: false
     strategy:
       matrix:
         name: [2022-64, 2022-32, 2019-64, 2019-32]
@@ -301,7 +303,7 @@ jobs:
 
   # Test documentation generation
   doxygen:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     container: johnmcfarlane/cnl_ci:base-21.10
     steps:
       - uses: actions/checkout@v2
@@ -391,7 +393,7 @@ jobs:
 
   # Install on mature Linux distro using only CMake
   install:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
 
diff --git a/.github/workflows/wide-integer.yml b/.github/workflows/wide-integer.yml
index 6f29d7e56..ce9424e6b 100644
--- a/.github/workflows/wide-integer.yml
+++ b/.github/workflows/wide-integer.yml
@@ -8,7 +8,7 @@ on:
 jobs:
   # Check for updates to wide-integer library
   update-check:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     container: johnmcfarlane/cnl_ci:base-21.10
     steps:
       - uses: actions/checkout@v2
diff --git a/test/unit/presentations/cppcon2017.cpp b/test/unit/presentations/cppcon2017.cpp
index f044670f4..a83198379 100644
--- a/test/unit/presentations/cppcon2017.cpp
+++ b/test/unit/presentations/cppcon2017.cpp
@@ -20,7 +20,7 @@ namespace filesystem = std::filesystem;
 template<typename Rep = int, int Exponent = 0, int Radix = 2>
 using fixed_point = cnl::scaled_integer<Rep, cnl::power<Exponent, Radix>>;
 
-#if (defined(_MSC_VER) && _MSC_VER < 1932)  || (defined(__GNUC__) && __cplusplus < 201703L) // wg21.link/LWG3657
+#if (defined(_MSC_VER) && _MSC_VER < 1932) || (defined(__GNUC__) && __cplusplus < 201703L)  // wg21.link/LWG3657
 template<>
 struct std::hash<filesystem::path> {
     auto operator()(filesystem::path const& p) const
@@ -30,6 +30,7 @@ struct std::hash<filesystem::path> {
 };
 #endif
 
+#if (defined(__clang__) && (__clang_major__ <= 13))  // wg21.link/LWG3657
 namespace a {
     using std::unique_ptr;
     using std::unordered_map;
@@ -38,6 +39,7 @@ namespace a {
     // NOLINTNEXTLINE(cppcoreguidelines-avoid-c-arrays,cppcoreguidelines-avoid-non-const-global-variables)
     unordered_map<filesystem::path, unique_ptr<byte[]>> cache;
 }
+#endif
 
 namespace b {
     void f()
diff --git a/test/unit/presentations/cppdub2018.cpp b/test/unit/presentations/cppdub2018.cpp
index 0a9e84076..6c0c509cd 100644
--- a/test/unit/presentations/cppdub2018.cpp
+++ b/test/unit/presentations/cppdub2018.cpp
@@ -22,7 +22,7 @@ using cnl::make_scaled_integer;
 using cnl::power;
 using cnl::scaled_integer;
 
-#if (defined(_MSC_VER) && _MSC_VER < 1932)  || (defined(__GNUC__) && __cplusplus < 201703L) // wg21.link/LWG3657
+#if (defined(_MSC_VER) && _MSC_VER < 1932) || (defined(__GNUC__) && __cplusplus < 201703L)  // wg21.link/LWG3657
 template<>
 struct std::hash<filesystem::path> {
     auto operator()(filesystem::path const& p) const
@@ -32,6 +32,7 @@ struct std::hash<filesystem::path> {
 };
 #endif
 
+#if (defined(__clang__) && (__clang_major__ <= 13))  // wg21.link/LWG3657
 namespace a {
     using std::unique_ptr;
     using std::unordered_map;
@@ -40,6 +41,7 @@ namespace a {
     // NOLINTNEXTLINE(cppcoreguidelines-avoid-c-arrays,cppcoreguidelines-avoid-non-const-global-variables)
     unordered_map<filesystem::path, unique_ptr<byte[]>> cache;
 }
+#endif
 
 namespace b {
 #if defined(CNL_IOSTREAMS_ENABLED)