diff --git a/cpp/CMakeLists.txt b/cpp/CMakeLists.txt
index 37d237e0e3..53351393ee 100644
--- a/cpp/CMakeLists.txt
+++ b/cpp/CMakeLists.txt
@@ -29,6 +29,11 @@ project(
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules/")
 
+# For now, disable CMake's automatic module scanning for C++ files. There is an sccache bug in the
+# version RAPIDS uses in CI that causes it to handle the resulting -M* flags incorrectly with
+# gcc>=14. We can remove this once we upgrade to a newer sccache version.
+set(CMAKE_CXX_SCAN_FOR_MODULES OFF)
+
 # Write the version header
 rapids_cmake_write_version_file(include/kvikio/version_config.hpp)
 
diff --git a/cpp/benchmarks/CMakeLists.txt b/cpp/benchmarks/CMakeLists.txt
index 665d45edfb..fc857fdfdf 100644
--- a/cpp/benchmarks/CMakeLists.txt
+++ b/cpp/benchmarks/CMakeLists.txt
@@ -42,7 +42,14 @@ function(kvikio_add_benchmark)
   endif()
 
   add_executable(${_KVIKIO_NAME} ${_KVIKIO_SOURCES})
-  set_target_properties(${_KVIKIO_NAME} PROPERTIES INSTALL_RPATH "\$ORIGIN/../../../lib")
+  set_target_properties(
+    ${_KVIKIO_NAME}
+    PROPERTIES INSTALL_RPATH "\$ORIGIN/../../../lib"
+               CXX_STANDARD 20
+               CXX_STANDARD_REQUIRED ON
+               CUDA_STANDARD 20
+               CUDA_STANDARD_REQUIRED ON
+  )
 
   target_link_libraries(${_KVIKIO_NAME} PUBLIC benchmark::benchmark kvikio::kvikio)
 
diff --git a/cpp/tests/CMakeLists.txt b/cpp/tests/CMakeLists.txt
index a6b8391928..3d53bbd86f 100644
--- a/cpp/tests/CMakeLists.txt
+++ b/cpp/tests/CMakeLists.txt
@@ -50,11 +50,9 @@ function(kvikio_add_test)
   set_target_properties(
     ${_KVIKIO_NAME}
     PROPERTIES RUNTIME_OUTPUT_DIRECTORY "$<BUILD_INTERFACE:${KvikIO_BINARY_DIR}/gtests>"
-               CXX_STANDARD 17
+               CXX_STANDARD 20
                CXX_STANDARD_REQUIRED ON
-               # For std:: support of __int128_t. Can be removed once using cuda::std
-               CXX_EXTENSIONS ON
-               CUDA_STANDARD 17
+               CUDA_STANDARD 20
                CUDA_STANDARD_REQUIRED ON
   )
   target_link_libraries(