diff --git a/libc/cmake/modules/LLVMLibCTestRules.cmake b/libc/cmake/modules/LLVMLibCTestRules.cmake
--- a/libc/cmake/modules/LLVMLibCTestRules.cmake
+++ b/libc/cmake/modules/LLVMLibCTestRules.cmake
@@ -725,6 +725,7 @@
     COMMAND ${test_cmd}
     COMMAND_EXPAND_LISTS
     COMMENT "Running hermetic test ${fq_target_name}"
+    ${LIBC_HERMETIC_TEST_JOB_POOL}
   )
 
   add_dependencies(${HERMETIC_TEST_SUITE} ${fq_target_name})
diff --git a/libc/cmake/modules/prepare_libc_gpu_build.cmake b/libc/cmake/modules/prepare_libc_gpu_build.cmake
--- a/libc/cmake/modules/prepare_libc_gpu_build.cmake
+++ b/libc/cmake/modules/prepare_libc_gpu_build.cmake
@@ -71,6 +71,16 @@
                       "build")
 endif()
 
+# Optionally set up a job pool to limit the number of GPU tests run in parallel.
+# This is sometimes necessary as running too many tests in parallel can cause
+# the GPU or driver to run out of resources.
+set(LIBC_GPU_TEST_JOBS "" CACHE STRING "Number of jobs to run in parallel for "
+                                       "GPU tests")
+if(LIBC_GPU_TEST_JOBS)
+  set_property(GLOBAL PROPERTY JOB_POOLS LIBC_GPU_TEST_POOL=${LIBC_GPU_TEST_JOBS})
+  set(LIBC_HERMETIC_TEST_JOB_POOL JOB_POOL LIBC_GPU_TEST_POOL)
+endif()
+
 set(LIBC_GPU_TEST_ARCHITECTURE "" CACHE STRING "Architecture for the GPU tests")
 
 set(gpu_test_architecture "")