diff --git a/Tests/RunCMake/CXXModules/examples/internal-partitions/CMakeLists.txt b/Tests/RunCMake/CXXModules/examples/internal-partitions/CMakeLists.txt
index bf99f7c121..ecbae34fa4 100644
--- a/Tests/RunCMake/CXXModules/examples/internal-partitions/CMakeLists.txt
+++ b/Tests/RunCMake/CXXModules/examples/internal-partitions/CMakeLists.txt
@@ -19,7 +19,8 @@ target_sources(internal-partitions
         "${CMAKE_CURRENT_SOURCE_DIR}"
       FILES
         importable.cxx
-        partition.cxx)
+        partition.cxx
+        internal.cxx)
 target_compile_features(internal-partitions PUBLIC cxx_std_20)
 
 add_executable(exe)
diff --git a/Tests/RunCMake/CXXModules/examples/internal-partitions/importable.cxx b/Tests/RunCMake/CXXModules/examples/internal-partitions/importable.cxx
index 3b3d3134d6..b180cb08e7 100644
--- a/Tests/RunCMake/CXXModules/examples/internal-partitions/importable.cxx
+++ b/Tests/RunCMake/CXXModules/examples/internal-partitions/importable.cxx
@@ -3,6 +3,12 @@ import :internal_partition;
 
 #include "internal-partitions_export.h"
 
+export struct module_struct
+{
+private:
+  partition_struct p;
+};
+
 export INTERNAL_PARTITIONS_EXPORT int from_import()
 {
   return from_partition();
diff --git a/Tests/RunCMake/CXXModules/examples/internal-partitions/internal.cxx b/Tests/RunCMake/CXXModules/examples/internal-partitions/internal.cxx
new file mode 100644
index 0000000000..9dc1470b46
--- /dev/null
+++ b/Tests/RunCMake/CXXModules/examples/internal-partitions/internal.cxx
@@ -0,0 +1,11 @@
+export module internal;
+
+export struct internal_struct
+{
+  int x;
+};
+
+export int from_internal()
+{
+  return 0;
+}
diff --git a/Tests/RunCMake/CXXModules/examples/internal-partitions/main.cxx b/Tests/RunCMake/CXXModules/examples/internal-partitions/main.cxx
index feb38d22e5..692a470019 100644
--- a/Tests/RunCMake/CXXModules/examples/internal-partitions/main.cxx
+++ b/Tests/RunCMake/CXXModules/examples/internal-partitions/main.cxx
@@ -2,5 +2,5 @@ import importable;
 
 int main(int argc, char* argv[])
 {
-  return from_import();
+  return from_import() * sizeof(module_struct);
 }
diff --git a/Tests/RunCMake/CXXModules/examples/internal-partitions/partition.cxx b/Tests/RunCMake/CXXModules/examples/internal-partitions/partition.cxx
index c828612ec1..67ab2ff3ca 100644
--- a/Tests/RunCMake/CXXModules/examples/internal-partitions/partition.cxx
+++ b/Tests/RunCMake/CXXModules/examples/internal-partitions/partition.cxx
@@ -1,6 +1,12 @@
 module importable:internal_partition;
+import internal;
+
+struct partition_struct
+{
+  internal_struct i;
+};
 
 int from_partition()
 {
-  return 0;
+  return from_internal();
 }