diff --git a/c/src/lib/libbsp/m32c/m32cbsp/make/custom/m32csim-testsuite.tcfg b/c/src/lib/libbsp/m32c/m32cbsp/make/custom/m32csim-testsuite.tcfg
index 8f5ff1e1ed..8d726761b4 100644
--- a/c/src/lib/libbsp/m32c/m32cbsp/make/custom/m32csim-testsuite.tcfg
+++ b/c/src/lib/libbsp/m32c/m32cbsp/make/custom/m32csim-testsuite.tcfg
@@ -17,6 +17,7 @@ exclude: fsrfsbitmap01
 exclude: sha
 exclude: spstkalloc02
 exclude: sptls01
+exclude: sptls04
 exclude: tmcontext01
 exclude: utf8proc01