diff --git a/test/release-path.test.sh b/test/release-path.test.sh
index fad884d..46181c8 100755
--- a/test/release-path.test.sh
+++ b/test/release-path.test.sh
@@ -97,6 +97,17 @@ path_check() {
   [ -z "$missing" ] && [ -z "$extra" ]
 }
 
+readme_has_no_path_enumeration() {
+  local token found=no
+  for token in bin/ lib/version.sh lib/decide.sh lib/facts.sh lib/changelog.sh; do
+    if grep -qF "$token" "$ROOT/drills/README.md"; then
+      printf 'drill doctrine enumerates release path: %s\n' "$token" >&2
+      found=yes
+    fi
+  done
+  [ "$found" = no ]
+}
+
 fixture() {
   local name="$1" tree
   tree="$TMP/$name"
@@ -125,6 +136,8 @@ check "manifest prints the specified ordered release path" 0 \
   bash "$PATH_SCRIPT"
 check "real workflow and transitive dependencies match the manifest" 0 "" \
   path_check "$ROOT"
+check "drill doctrine does not duplicate the executable release path" 0 "" \
+  readme_has_no_path_enumeration
 
 # A door growing a dependency must name the missing path (#237 D7).
 tree="$(fixture missing)"