diff --git a/compiler-rt/test/sanitizer_common/TestCases/sanitizer_coverage_inline8bit_counter_default_impl.cpp b/compiler-rt/test/sanitizer_common/TestCases/sanitizer_coverage_inline8bit_counter_default_impl.cpp
index 1ac04b53491e1..1d1fbf7299e8b 100644
--- a/compiler-rt/test/sanitizer_common/TestCases/sanitizer_coverage_inline8bit_counter_default_impl.cpp
+++ b/compiler-rt/test/sanitizer_common/TestCases/sanitizer_coverage_inline8bit_counter_default_impl.cpp
@@ -3,7 +3,9 @@
 
 // REQUIRES: has_sancovcc,stable-runtime,linux,x86_64-target-arch
 
-// RUN: %clangxx -O0 %s -fsanitize-coverage=inline-8bit-counters,pc-table -o %t
+/// In glibc 2.39+, fprintf has a nonnull attribute. Disable nonnull-attribute,
+/// which would increase counters for ubsan.
+// RUN: %clangxx -O0 %s -fsanitize-coverage=inline-8bit-counters,pc-table -fno-sanitize=nonnull-attribute -o %t
 // RUN: rm -f %t-counters %t-pcs
 // RUN: env %tool_options="cov_8bit_counters_out=%t-counters cov_pcs_out=%t-pcs verbosity=1" %run %t 2>&1 | FileCheck %s
 
diff --git a/compiler-rt/test/sanitizer_common/TestCases/sanitizer_coverage_symbolize.cpp b/compiler-rt/test/sanitizer_common/TestCases/sanitizer_coverage_symbolize.cpp
index daa994c811625..b168954a1c92c 100644
--- a/compiler-rt/test/sanitizer_common/TestCases/sanitizer_coverage_symbolize.cpp
+++ b/compiler-rt/test/sanitizer_common/TestCases/sanitizer_coverage_symbolize.cpp
@@ -7,7 +7,9 @@
 // RUN: rm -rf $DIR
 // RUN: mkdir -p $DIR
 // RUN: cd $DIR
-// RUN: %clangxx -O0 -fsanitize-coverage=trace-pc-guard %s -o %t
+/// In glibc 2.39+, fprintf has a nonnull attribute. Disable nonnull-attribute,
+/// which would increase counters for ubsan.
+// RUN: %clangxx -O0 -fsanitize-coverage=trace-pc-guard -fno-sanitize=nonnull-attribute %s -o %t
 // RUN: %env_tool_opts=coverage=1 %t 2>&1 | FileCheck %s
 // RUN: rm -rf $DIR