diff --git a/check-linuxcnc-wasm-blockers-source-map.sh b/check-linuxcnc-wasm-blockers-source-map.sh
index 15f5722..d1a7d71 100755
--- a/check-linuxcnc-wasm-blockers-source-map.sh
+++ b/check-linuxcnc-wasm-blockers-source-map.sh
@@ -180,4 +180,11 @@ for entry in [
     text = Path(entry).read_text(encoding="utf-8")
     if "./check-linuxcnc-wasm-blockers-source-map.sh" not in text:
         raise SystemExit(f"{entry} must run ./check-linuxcnc-wasm-blockers-source-map.sh")
+for entry in [
+    "test-native.sh",
+    "test-linuxcnc-source-link.sh",
+]:
+    text = Path(entry).read_text(encoding="utf-8")
+    if "CNC_SIM_WASM_BLOCKERS_SELF_CHECKS=1" not in text:
+        raise SystemExit(f"{entry} must run wasm blocker analyzer self-checks")
 PY
diff --git a/docs/linuxcnc-wasm-blockers-source-map.md b/docs/linuxcnc-wasm-blockers-source-map.md
index 6da3a50..5fa3c62 100644
--- a/docs/linuxcnc-wasm-blockers-source-map.md
+++ b/docs/linuxcnc-wasm-blockers-source-map.md
@@ -74,6 +74,10 @@ Required tracked core examples:
 - `test-native.sh`, `test-linuxcnc-source-link.sh`, and `build-wasm.sh` must
   run `./check-linuxcnc-wasm-blockers-source-map.sh` before consuming blocker
   analyzer output, source-linked LinuxCNC objects, or browser artifacts.
+- `test-native.sh` and `test-linuxcnc-source-link.sh` must run
+  `test-linuxcnc-wasm-blockers.sh` with `CNC_SIM_WASM_BLOCKERS_SELF_CHECKS=1`
+  so bad manifests, missing LinuxCNC roots, duplicate entries, and missing
+  blocked-source replacements stay executable failures.
 - The WASM blockers source-map guard validates LinuxCNC source/blocker
   ownership and manifest drift only; it does not interpret G-code.
 
diff --git a/test-linuxcnc-source-link.sh b/test-linuxcnc-source-link.sh
index 21d71b4..c026dc5 100755
--- a/test-linuxcnc-source-link.sh
+++ b/test-linuxcnc-source-link.sh
@@ -47,6 +47,8 @@ LINUXCNC_ROOT="$linuxcnc_root" ./check-linuxcnc-inputs-cached.sh --cache-dir "$p
 ./check-linuxcnc-tooldata-source-map.sh
 ./check-linuxcnc-wasm-shims-source-map.sh
 ./check-linuxcnc-wasm-blockers-source-map.sh
+CNC_SIM_PREFLIGHT_CACHE_DIR="$preflight_cache_dir" CNC_SIM_WASM_BLOCKERS_SELF_CHECKS=1 \
+    ./test-linuxcnc-wasm-blockers.sh linuxcnc-rs274-wasm-source-files.txt
 LINUXCNC_ROOT="$linuxcnc_root" ./check-linuxcnc-switchkins-remap-table-cached.sh --cache-dir "$preflight_cache_dir" linuxcnc-kinematics-source-files.txt
 # The LinuxCNC source-linked dump path is not concurrency-safe under parallel execution.
 exec 9>"${TMPDIR:-/tmp}/cnc_sim_rs274_source_link.lock"
diff --git a/test-native.sh b/test-native.sh
index cff0859..e0b3967 100755
--- a/test-native.sh
+++ b/test-native.sh
@@ -45,6 +45,8 @@ preflight_cache_dir="$build_dir/preflight-cache"
 ./check-linuxcnc-tooldata-source-map.sh
 ./check-linuxcnc-wasm-shims-source-map.sh
 ./check-linuxcnc-wasm-blockers-source-map.sh
+CNC_SIM_PREFLIGHT_CACHE_DIR="$preflight_cache_dir" CNC_SIM_WASM_BLOCKERS_SELF_CHECKS=1 \
+    ./test-linuxcnc-wasm-blockers.sh linuxcnc-rs274-wasm-source-files.txt
 ./check-linuxcnc-switchkins-remap-table-cached.sh --cache-dir "$preflight_cache_dir" linuxcnc-kinematics-source-files.txt
 grep -F 'tooldata:src/emc/tooldata/tooldata_nml.cc:NML tool table backend selected by LinuxCNC TOOL_NML_FLAG' linuxcnc-rs274-source-files.txt >/dev/null
 grep -F 'tooldata:src/emc/tooldata/tool_mmap_read.cc:LinuxCNC tooldata mmap reader utility source from tooldata Submakefile' linuxcnc-rs274-source-files.txt >/dev/null