diff --git a/tools/testing/selftests/powerpc/harness.c b/tools/testing/selftests/powerpc/harness.c
index 0ad4f12b3d43a8..5876220d8ff23c 100644
--- a/tools/testing/selftests/powerpc/harness.c
+++ b/tools/testing/selftests/powerpc/harness.c
@@ -24,7 +24,7 @@
 /* Setting timeout to -1 disables the alarm */
 static uint64_t timeout = 120;
 
-int run_test(int (test_function)(void), char *name)
+int run_test(int (test_function)(void), const char *name)
 {
 	bool terminated;
 	int rc, status;
@@ -101,7 +101,7 @@ void test_harness_set_timeout(uint64_t time)
 	timeout = time;
 }
 
-int test_harness(int (test_function)(void), char *name)
+int test_harness(int (test_function)(void), const char *name)
 {
 	int rc;
 
diff --git a/tools/testing/selftests/powerpc/include/subunit.h b/tools/testing/selftests/powerpc/include/subunit.h
index 068d55fdf80f9f..b0bb774617c9c6 100644
--- a/tools/testing/selftests/powerpc/include/subunit.h
+++ b/tools/testing/selftests/powerpc/include/subunit.h
@@ -6,37 +6,37 @@
 #ifndef _SELFTESTS_POWERPC_SUBUNIT_H
 #define _SELFTESTS_POWERPC_SUBUNIT_H
 
-static inline void test_start(char *name)
+static inline void test_start(const char *name)
 {
 	printf("test: %s\n", name);
 }
 
-static inline void test_failure_detail(char *name, char *detail)
+static inline void test_failure_detail(const char *name, const char *detail)
 {
 	printf("failure: %s [%s]\n", name, detail);
 }
 
-static inline void test_failure(char *name)
+static inline void test_failure(const char *name)
 {
 	printf("failure: %s\n", name);
 }
 
-static inline void test_error(char *name)
+static inline void test_error(const char *name)
 {
 	printf("error: %s\n", name);
 }
 
-static inline void test_skip(char *name)
+static inline void test_skip(const char *name)
 {
 	printf("skip: %s\n", name);
 }
 
-static inline void test_success(char *name)
+static inline void test_success(const char *name)
 {
 	printf("success: %s\n", name);
 }
 
-static inline void test_finish(char *name, int status)
+static inline void test_finish(const char *name, int status)
 {
 	if (status)
 		test_failure(name);
@@ -44,7 +44,7 @@ static inline void test_finish(char *name, int status)
 		test_success(name);
 }
 
-static inline void test_set_git_version(char *value)
+static inline void test_set_git_version(const char *value)
 {
 	printf("tags: git_version:%s\n", value);
 }
diff --git a/tools/testing/selftests/powerpc/include/utils.h b/tools/testing/selftests/powerpc/include/utils.h
index 36c30c61145732..66d7b2368dd489 100644
--- a/tools/testing/selftests/powerpc/include/utils.h
+++ b/tools/testing/selftests/powerpc/include/utils.h
@@ -32,7 +32,7 @@ typedef uint16_t u16;
 typedef uint8_t u8;
 
 void test_harness_set_timeout(uint64_t time);
-int test_harness(int (test_function)(void), char *name);
+int test_harness(int (test_function)(void), const char *name);
 
 int read_auxv(char *buf, ssize_t buf_size);
 void *find_auxv_entry(int type, char *auxv);