diff --git a/internal/providercache/testdata/cachedir/registry.terraform.io/hashicorp/null/2.0.0/windows_amd64/terraform-provider-null.exe b/internal/providercache/testdata/cachedir/registry.terraform.io/hashicorp/null/2.0.0/windows_amd64/terraform-provider-null.exe
new file mode 100644
index 000000000..daa9e3509
--- /dev/null
+++ b/internal/providercache/testdata/cachedir/registry.terraform.io/hashicorp/null/2.0.0/windows_amd64/terraform-provider-null.exe
@@ -0,0 +1 @@
+# This is just a placeholder file for discovery testing, not a real provider plugin.