diff --git a/test/7.3.7.fs b/test/7.3.7.fs
new file mode 100644
index 0000000..b9084cd
--- /dev/null
+++ b/test/7.3.7.fs
@@ -0,0 +1,4 @@
+testing 7.3.7 Flag constants
+
+t{ false -> 0 }t
+t{ true -> 0 invert }t
diff --git a/test/test-manifest.yaml b/test/test-manifest.yaml
index 62b4121..71699db 100644
--- a/test/test-manifest.yaml
+++ b/test/test-manifest.yaml
@@ -38,4 +38,8 @@
   load:
     - tester.fs
     - test-utils.fs
-    - 7.3.6.fs
\ No newline at end of file
+    - 7.3.6.fs
+- name: 7.3.7 Flag constants
+  load:
+    - tester.fs
+    - 7.3.7.fs