diff --git a/overlays/test-exclusions.nix b/overlays/test-exclusions.nix
index 0773771..4f53cee 100644
--- a/overlays/test-exclusions.nix
+++ b/overlays/test-exclusions.nix
@@ -4,10 +4,10 @@
 # nixpkgs binary cache cannot be used and upstream test suites run locally.
 # The jeeves builder uses /tmp/nix-builds so filesystem tests run on tmpfs
 # instead of ZFS with normalization=formD and utf8only=on; those tests remain
-# enabled. The remaining workarounds cover UDP readiness, nested-worker
-# scheduling races, and mismatched timeout clocks, plus architecture-dependent
-# floating-point differences whose risk we accept for our workloads. Keep these
-# exceptions visible until their causes are fixed.
+# enabled. The remaining workarounds cover UDP readiness, resource-sensitive
+# parser and nested-worker races, and mismatched timeout clocks, plus
+# architecture-dependent floating-point differences whose risk we accept for
+# our workloads. Keep these exceptions visible until their causes are fixed.
 _final: prev: {
   gnutls = prev.gnutls.overrideAttrs (old: {
     # This test uses a fixed four-second sleep instead of checking UDP
@@ -17,6 +17,32 @@ _final: prev: {
     '';
   });
 
+  prometheus = prev.prometheus.overrideAttrs (
+    old:
+    let
+      assets = old.passthru.assets.overrideAttrs (assetsOld: {
+        # CodeMirror's bounded synchronous parser can return an incomplete tree
+        # when these cases run on a heavily loaded builder.
+        postPatch = (assetsOld.postPatch or "") + ''
+          substituteInPlace module/codemirror-promql/src/complete/hybrid.test.ts \
+            --replace-fail "it(value.title, () => {" \
+            "(value.title === 'autocomplete topk params 2' ? it.skip : it)(value.title, () => {"
+          substituteInPlace module/codemirror-promql/src/parser/vector.test.ts \
+            --replace-fail "it(value.binaryExpr, () => {" \
+            "(value.binaryExpr === 'foo * on(test,blub) bar' ? it.skip : it)(value.binaryExpr, () => {"
+        '';
+      });
+    in
+    {
+      postPatch = builtins.replaceStrings [ "${old.passthru.assets}" ] [ "${assets}" ] (
+        builtins.unsafeDiscardStringContext old.postPatch
+      );
+      passthru = old.passthru // {
+        inherit assets;
+      };
+    }
+  );
+
   pythonPackagesExtensions = prev.pythonPackagesExtensions ++ [
     (_pythonFinal: pythonPrev: {
       backrefs = pythonPrev.backrefs.overridePythonAttrs (old: {
@@ -38,6 +64,11 @@ _final: prev: {
         preCheck = builtins.replaceStrings [ "--numprocesses=$NIX_BUILD_CORES" ] [ "--numprocesses=1" ] (
           old.preCheck or ""
         );
+        # This test deliberately crashes workers past the restart limit and
+        # races while checking which replacement message was emitted.
+        disabledTests = (old.disabledTests or [ ]) ++ [
+          "test_max_worker_restart_tests_queued"
+        ];
       });
 
       scipy = pythonPrev.scipy.overridePythonAttrs (old: {