diff --git a/src/client/linux/microdump_writer/microdump_writer_unittest.cc b/src/client/linux/microdump_writer/microdump_writer_unittest.cc
index e5e6f448..cbcd1399 100644
--- a/src/client/linux/microdump_writer/microdump_writer_unittest.cc
+++ b/src/client/linux/microdump_writer/microdump_writer_unittest.cc
@@ -95,7 +95,7 @@ void CrashAndGetMicrodump(const MappingList& mappings,
   // has been sanitized.
   strcpy(identifiable_string, kIdentifiableString);
   // Force the strcpy to not be optimized away.
-  write(STDOUT_FILENO, identifiable_string, 0);
+  IGNORE_RET(write(STDOUT_FILENO, identifiable_string, 0));
 
   const pid_t child = fork();
   if (child == 0) {
diff --git a/src/client/mac/tests/exception_handler_test.cc b/src/client/mac/tests/exception_handler_test.cc
index a8cf6968..d5b505a1 100644
--- a/src/client/mac/tests/exception_handler_test.cc
+++ b/src/client/mac/tests/exception_handler_test.cc
@@ -36,6 +36,7 @@
 
 #include "breakpad_googletest_includes.h"
 #include "client/mac/handler/exception_handler.h"
+#include "common/linux/ignore_ret.h"
 #include "common/mac/MachIPC.h"
 #include "common/tests/auto_tempdir.h"
 #include "google_breakpad/processor/minidump.h"
@@ -93,7 +94,7 @@ static bool MDCallback(const char *dump_dir, const char *file_name,
   path.append(".dmp");
 
   int fd = *reinterpret_cast<int*>(context);
-  (void)write(fd, path.c_str(), path.length() + 1);
+  IGNORE_RET(write(fd, path.c_str(), path.length() + 1));
   close(fd);
   exit(0);
   // not reached
@@ -293,7 +294,7 @@ TEST_F(ExceptionHandlerTest, DumpChildProcess) {
 
   // Unblock child process
   uint8_t data = 1;
-  (void)write(fds[1], &data, 1);
+  IGNORE_RET(write(fds[1], &data, 1));
 
   // Child process should have exited with a zero status.
   int ret;
diff --git a/src/client/mac/tests/minidump_generator_test.cc b/src/client/mac/tests/minidump_generator_test.cc
index d40c7d98..b1fa5d02 100644
--- a/src/client/mac/tests/minidump_generator_test.cc
+++ b/src/client/mac/tests/minidump_generator_test.cc
@@ -42,6 +42,7 @@
 #include "breakpad_googletest_includes.h"
 #include "client/mac/handler/minidump_generator.h"
 #include "client/mac/tests/spawn_child_process.h"
+#include "common/linux/ignore_ret.h"
 #include "common/mac/MachIPC.h"
 #include "common/tests/auto_tempdir.h"
 #include "google_breakpad/processor/minidump.h"
@@ -190,7 +191,7 @@ TEST_F(MinidumpGeneratorTest, OutOfProcess) {
 
   // Unblock child process
   uint8_t data = 1;
-  (void)write(fds[1], &data, 1);
+  IGNORE_RET(write(fds[1], &data, 1));
 
   // Child process should have exited with a zero status.
   int ret;