diff --git a/test/compilers/hello-sycl.nix b/test/compilers/hello-sycl.nix
index 9bdec078..ea205572 100644
--- a/test/compilers/hello-sycl.nix
+++ b/test/compilers/hello-sycl.nix
@@ -71,6 +71,8 @@ stdenv.mkDerivation (finalAttrs: {
         # Make PoCL report Intel vendor id so oneapi SYCL works
         POCL_DRIVER_VERSION_OVERRIDE = "2024.18.6.0.02_160000";
         POCL_CPU_VENDOR_ID_OVERRIDE = 32902;
+
+        HWLOC_SYNTHETIC = "node:1 core:1 pu:1";
       };
       doInstallCheck = true;
       installCheckPhase = ''
diff --git a/test/compilers/icpx-ompss2.nix b/test/compilers/icpx-ompss2.nix
index d6d320c7..3f673e55 100644
--- a/test/compilers/icpx-ompss2.nix
+++ b/test/compilers/icpx-ompss2.nix
@@ -59,6 +59,8 @@ intelPackages.stdenv.mkDerivation (finalAttrs: {
         # Make PoCL report Intel vendor id so oneapi SYCL works
         POCL_DRIVER_VERSION_OVERRIDE = "2024.18.6.0.02_160000";
         POCL_CPU_VENDOR_ID_OVERRIDE = 32902;
+
+        HWLOC_SYNTHETIC = "node:1 core:1 pu:1";
       };
       doInstallCheck = true;
       installCheckPhase = ''