diff --git a/.github/workflows/ci_tests.yml b/.github/workflows/ci_tests.yml
index b47cead..23a670a 100644
--- a/.github/workflows/ci_tests.yml
+++ b/.github/workflows/ci_tests.yml
@@ -62,7 +62,7 @@ jobs:
                     }
                   ]
                 },
-                { "cxxversions": ["c++20", "c++17"],
+                { "cxxversions": ["c++20"],
                   "tests": [{ "stdlibs": ["libstdc++"], "tests": ["Release.Default"]}]
                 }
               ]
@@ -78,14 +78,14 @@ jobs:
                     }
                   ]
                 },
-                { "cxxversions": ["c++20", "c++17"],
+                { "cxxversions": ["c++20"],
                   "tests": [{ "stdlibs": ["libstdc++"], "tests": ["Release.Default"]}]
                 }
               ]
             },
             { "versions": ["14", "13"],
               "tests": [
-                { "cxxversions": ["c++26", "c++23", "c++20", "c++17"],
+                { "cxxversions": ["c++26", "c++23", "c++20"],
                   "tests": [{ "stdlibs": ["libstdc++"], "tests": ["Release.Default"]}]
                 }
               ]
@@ -93,7 +93,7 @@ jobs:
             {
               "versions": ["12", "11"],
               "tests": [
-                { "cxxversions": ["c++23", "c++20", "c++17"],
+                { "cxxversions": ["c++23", "c++20"],
                   "tests": [{ "stdlibs": ["libstdc++"], "tests": ["Release.Default"]}]
                 }
               ]
@@ -122,7 +122,7 @@ jobs:
                     }
                   ]
                 },
-                { "cxxversions": ["c++20", "c++17"],
+                { "cxxversions": ["c++20"],
                   "tests": [
                     {"stdlibs": ["libstdc++", "libc++"], "tests": ["Release.Default"]}
                   ]
@@ -131,7 +131,7 @@ jobs:
             },
             { "versions": ["21", "20", "19"],
               "tests": [
-                { "cxxversions": ["c++26", "c++23", "c++20", "c++17"],
+                { "cxxversions": ["c++26", "c++23", "c++20"],
                   "tests": [
                     {"stdlibs": ["libstdc++", "libc++"], "tests": ["Release.Default"]}
                   ]
@@ -140,20 +140,20 @@ jobs:
             },
             { "versions": ["18"],
               "tests": [
-                { "cxxversions": ["c++26", "c++23", "c++20", "c++17"],
+                { "cxxversions": ["c++26", "c++23", "c++20"],
                   "tests": [{"stdlibs": ["libc++"], "tests": ["Release.Default"]}]
                 },
-                { "cxxversions": ["c++23", "c++20", "c++17"],
+                { "cxxversions": ["c++23", "c++20"],
                   "tests": [{"stdlibs": ["libstdc++"], "tests": ["Release.Default"]}]
                 }
               ]
             },
             { "versions": ["17"],
               "tests": [
-                { "cxxversions": ["c++26", "c++23", "c++20", "c++17"],
+                { "cxxversions": ["c++26", "c++23", "c++20"],
                   "tests": [{"stdlibs": ["libc++"], "tests": ["Release.Default"]}]
                 },
-                { "cxxversions": ["c++20", "c++17"],
+                { "cxxversions": ["c++20"],
                   "tests": [{"stdlibs": ["libstdc++"], "tests": ["Release.Default"]}]
                 }
               ]
@@ -162,7 +162,7 @@ jobs:
           "appleclang": [
             { "versions": ["latest"],
               "tests": [
-                { "cxxversions": ["c++26", "c++23", "c++20", "c++17"],
+                { "cxxversions": ["c++26", "c++23", "c++20"],
                   "tests": [{ "stdlibs": ["libc++"], "tests": ["Release.Default"]}]
                 }
               ]