diff --git a/.github/workflows/strix.yml b/.github/workflows/strix.yml
index 03ec23257..35025d144 100644
--- a/.github/workflows/strix.yml
+++ b/.github/workflows/strix.yml
@@ -861,7 +861,7 @@ jobs:
           fi
 
           # Recognized signals that the LLM backend was unavailable / starved.
-          backend_unavailable_signal='RateLimitError|Too many requests\. For more on scraping GitHub|exceeded your current quota|insufficient_quota|billing details|"status"[[:space:]]*:[[:space:]]*"RESOURCE_EXHAUSTED"|tokens_limit_reached|Request body too large|Max size:[[:space:]]*[0-9]+[[:space:]]+tokens|Error code:[[:space:]]*413|LLM CONNECTION FAILED|Could not establish connection to the language model|LLM warm-up failed|Configured model and fallback models were unavailable|Configured Vertex model and fallback models were unavailable|emitted provider infrastructure or failure-signal output|before provider infrastructure failure|litellm(\.exceptions)?\.NotFoundError[^[:cntrl:]]*Nvidia_nimException[^[:cntrl:]]*Error code:[[:space:]]*404'
+          backend_unavailable_signal='RateLimitError|Too many requests\. For more on scraping GitHub|exceeded your current quota|insufficient_quota|billing details|"status"[[:space:]]*:[[:space:]]*"RESOURCE_EXHAUSTED"|tokens_limit_reached|Request body too large|Max size:[[:space:]]*[0-9]+[[:space:]]+tokens|Error code:[[:space:]]*413|LLM CONNECTION FAILED|Could not establish connection to the language model|LLM warm-up failed|Configured model and fallback models were unavailable|Configured Vertex model and fallback models were unavailable|emitted provider infrastructure or failure-signal output|failed after provider infrastructure or failure-signal output|before provider infrastructure failure|litellm(\.exceptions)?\.NotFoundError[^[:cntrl:]]*Nvidia_nimException[^[:cntrl:]]*Error code:[[:space:]]*404'
           # Any evidence that a vulnerability was actually reported. Its presence
           # forces a hard failure so real findings are NEVER downgraded. Keep the
           # severity branch anchored away from identifiers so environment lines
diff --git a/tests/test_strix_nvidia_nim_not_found_fallback.py b/tests/test_strix_nvidia_nim_not_found_fallback.py
index a48f3092d..656bea088 100644
--- a/tests/test_strix_nvidia_nim_not_found_fallback.py
+++ b/tests/test_strix_nvidia_nim_not_found_fallback.py
@@ -243,6 +243,18 @@ def test_outer_workflow_never_neutralizes_reported_vulnerabilities(self) -> None
             )
         )
 
+    def test_outer_workflow_neutralizes_fail_closed_after_provider_infra(self) -> None:
+        """Recognize the exact fail-closed line required CI prints after NIM exit 2."""
+
+        self.assertTrue(
+            _workflow_neutralizes(
+                "Strix run failed for model 'nvidia_nim/nvidia/nemotron-3-super-120b-a12b' "
+                "after 4778s (exit code 2).\n"
+                "Strix scan failed after provider infrastructure or failure-signal output; "
+                "failing closed.\n"
+            )
+        )
+
     def test_workflow_neutralizes_only_nvidia_404_without_findings(self) -> None:
         """Retain the static fail-closed vulnerability evidence contract."""