diff --git a/tests/thread_priority_inversion/Makefile b/tests/thread_priority_inversion/Makefile
index f48eecd09c..e6b9a0a4dc 100644
--- a/tests/thread_priority_inversion/Makefile
+++ b/tests/thread_priority_inversion/Makefile
@@ -11,6 +11,11 @@ else
   FANCY ?= 0
 endif
 
+# KNOWN ISSUE #18534
+# Currently this is failing, causing unrelated errors to block other PRs.
+# This issue will be looked into but for now we need to just close our eyes.
+TEST_ON_CI_BLACKLIST += esp32-wroom-32
+
 include $(RIOTBASE)/Makefile.include
 
 CFLAGS += -DFANCY=$(FANCY)