diff --git a/src/taoensso/telemere/impl.cljc b/src/taoensso/telemere/impl.cljc
index 1bd6089..f216618 100644
--- a/src/taoensso/telemere/impl.cljc
+++ b/src/taoensso/telemere/impl.cljc
@@ -192,7 +192,9 @@
 (do     (enc/def-print-impl [sig Signal] (str "#" `Signal (pr-str (into {} sig)))))
 #?(:clj (enc/def-print-dup  [sig Signal] (str "#" `Signal (pr-str (into {} sig))))) ; NB intentionally verbose, to support extra keys
 
-(def standard-signal-keys (set (keys (map->Signal {:schema 0}))))
+(def standard-signal-keys
+  (disj (set (keys (map->Signal {:schema 0})))
+    :_otel-context))
 
 (comment
   (def s1 (with-signal (signal! {:level :info, :my-k1 :my-v1})))
diff --git a/test/taoensso/telemere_tests.cljc b/test/taoensso/telemere_tests.cljc
index 397d4d8..7472f6e 100644
--- a/test/taoensso/telemere_tests.cljc
+++ b/test/taoensso/telemere_tests.cljc
@@ -261,7 +261,7 @@
 
    #?(:clj
       (testing "Printing"
-        (let [sv1 (with-sig (sig! {:level :info, :run (+ 1 2), :my-k1 :my-v1}))
+        (let [sv1 (dissoc (with-sig (sig! {:level :info, :run (+ 1 2), :my-k1 :my-v1})) :_otel-context)
               sv1 ; Ensure instants are printable
               (-> sv1
                 (update-in [:inst]       enc/inst->udt)