diff --git a/tests/mars_stream/CMakeLists.txt b/tests/mars_stream/CMakeLists.txt
new file mode 100644
index 0000000..41368b2
--- /dev/null
+++ b/tests/mars_stream/CMakeLists.txt
@@ -0,0 +1,18 @@
+# mars/stream + mars/rng tests. test_save reads the owner's saves via SOTS_SAVES_DIR at run time
+# and skips cleanly when it is unset (saves never enter the repo).
+add_executable(mars_stream_test_rng test_rng.cpp)
+target_link_libraries(mars_stream_test_rng PRIVATE mars_rng)
+add_test(NAME mars_rng_unit COMMAND mars_stream_test_rng)
+
+add_executable(mars_stream_test_stream test_stream.cpp)
+target_link_libraries(mars_stream_test_stream PRIVATE mars_stream)
+add_test(NAME mars_stream_unit COMMAND mars_stream_test_stream)
+
+add_executable(mars_stream_test_save test_save.cpp)
+target_link_libraries(mars_stream_test_save PRIVATE mars_stream mars_rng)
+add_test(NAME mars_stream_save COMMAND mars_stream_test_save)
+
+foreach(_t mars_stream_test_rng mars_stream_test_stream mars_stream_test_save)
+  target_include_directories(${_t} PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
+  target_compile_options(${_t} PRIVATE -Wall -Wextra -Wpedantic)
+endforeach()