diff --git a/tools/testing/selftests/resctrl/mba_test.c b/tools/testing/selftests/resctrl/mba_test.c
index 4d2f145804b8..094424d835d0 100644
--- a/tools/testing/selftests/resctrl/mba_test.c
+++ b/tools/testing/selftests/resctrl/mba_test.c
@@ -141,7 +141,7 @@ void mba_test_cleanup(void)
 	remove(RESULT_FILE_NAME);
 }
 
-int mba_schemata_change(int cpu_no, char *bw_report, char **benchmark_cmd)
+int mba_schemata_change(int cpu_no, char **benchmark_cmd)
 {
 	struct resctrl_val_param param = {
 		.resctrl_val	= MBA_STR,
@@ -149,7 +149,7 @@ int mba_schemata_change(int cpu_no, char *bw_report, char **benchmark_cmd)
 		.mongrp		= "m1",
 		.cpu_no		= cpu_no,
 		.filename	= RESULT_FILE_NAME,
-		.bw_report	= bw_report,
+		.bw_report	= "reads",
 		.setup		= mba_setup
 	};
 	int ret;
diff --git a/tools/testing/selftests/resctrl/mbm_test.c b/tools/testing/selftests/resctrl/mbm_test.c
index c7de6f5977f6..3e4a800e0e40 100644
--- a/tools/testing/selftests/resctrl/mbm_test.c
+++ b/tools/testing/selftests/resctrl/mbm_test.c
@@ -109,7 +109,7 @@ void mbm_test_cleanup(void)
 	remove(RESULT_FILE_NAME);
 }
 
-int mbm_bw_change(size_t span, int cpu_no, char *bw_report, char **benchmark_cmd)
+int mbm_bw_change(size_t span, int cpu_no, char **benchmark_cmd)
 {
 	struct resctrl_val_param param = {
 		.resctrl_val	= MBM_STR,
@@ -118,7 +118,7 @@ int mbm_bw_change(size_t span, int cpu_no, char *bw_report, char **benchmark_cmd
 		.span		= span,
 		.cpu_no		= cpu_no,
 		.filename	= RESULT_FILE_NAME,
-		.bw_report	=  bw_report,
+		.bw_report	= "reads",
 		.setup		= mbm_setup
 	};
 	int ret;
diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h
index 838d1a438f33..f3446ac664c2 100644
--- a/tools/testing/selftests/resctrl/resctrl.h
+++ b/tools/testing/selftests/resctrl/resctrl.h
@@ -98,10 +98,10 @@ int perf_event_open(struct perf_event_attr *hw_event, pid_t pid, int cpu,
 		    int group_fd, unsigned long flags);
 int run_fill_buf(size_t span, int memflush, int op, bool once);
 int resctrl_val(char **benchmark_cmd, struct resctrl_val_param *param);
-int mbm_bw_change(size_t span, int cpu_no, char *bw_report, char **benchmark_cmd);
+int mbm_bw_change(size_t span, int cpu_no, char **benchmark_cmd);
 void tests_cleanup(void);
 void mbm_test_cleanup(void);
-int mba_schemata_change(int cpu_no, char *bw_report, char **benchmark_cmd);
+int mba_schemata_change(int cpu_no, char **benchmark_cmd);
 void mba_test_cleanup(void);
 int get_cbm_mask(char *cache_type, char *cbm_mask);
 int get_cache_size(int cpu_no, char *cache_type, unsigned long *cache_size);
diff --git a/tools/testing/selftests/resctrl/resctrl_tests.c b/tools/testing/selftests/resctrl/resctrl_tests.c
index 559868b16079..3dcd15a4b813 100644
--- a/tools/testing/selftests/resctrl/resctrl_tests.c
+++ b/tools/testing/selftests/resctrl/resctrl_tests.c
@@ -70,8 +70,7 @@ void tests_cleanup(void)
 	cat_test_cleanup();
 }
 
-static void run_mbm_test(char **benchmark_cmd, size_t span,
-			 int cpu_no, char *bw_report)
+static void run_mbm_test(char **benchmark_cmd, size_t span, int cpu_no)
 {
 	int res;
 
@@ -88,7 +87,7 @@ static void run_mbm_test(char **benchmark_cmd, size_t span,
 		goto umount;
 	}
 
-	res = mbm_bw_change(span, cpu_no, bw_report, benchmark_cmd);
+	res = mbm_bw_change(span, cpu_no, benchmark_cmd);
 	ksft_test_result(!res, "MBM: bw change\n");
 	if ((get_vendor() == ARCH_INTEL) && res)
 		ksft_print_msg("Intel MBM may be inaccurate when Sub-NUMA Clustering is enabled. Check BIOS configuration.\n");
@@ -97,7 +96,7 @@ static void run_mbm_test(char **benchmark_cmd, size_t span,
 	umount_resctrlfs();
 }
 
-static void run_mba_test(char **benchmark_cmd, int cpu_no, char *bw_report)
+static void run_mba_test(char **benchmark_cmd, int cpu_no)
 {
 	int res;
 
@@ -114,7 +113,7 @@ static void run_mba_test(char **benchmark_cmd, int cpu_no, char *bw_report)
 		goto umount;
 	}
 
-	res = mba_schemata_change(cpu_no, bw_report, benchmark_cmd);
+	res = mba_schemata_change(cpu_no, benchmark_cmd);
 	ksft_test_result(!res, "MBA: schemata change\n");
 
 umount:
@@ -174,9 +173,9 @@ static void run_cat_test(int cpu_no, int no_of_bits)
 int main(int argc, char **argv)
 {
 	bool has_ben = false, mbm_test = true, mba_test = true, cmt_test = true;
-	char *benchmark_cmd[BENCHMARK_ARGS], bw_report[64], bm_type[64];
 	char benchmark_cmd_area[BENCHMARK_ARGS][BENCHMARK_ARG_SIZE];
 	int c, cpu_no = 1, argc_new = argc, i, no_of_bits = 0;
+	char *benchmark_cmd[BENCHMARK_ARGS];
 	int ben_ind, ben_count, tests = 0;
 	size_t span = 250 * MB;
 	bool cat_test = true;
@@ -277,9 +276,6 @@ int main(int argc, char **argv)
 		benchmark_cmd[5] = NULL;
 	}
 
-	sprintf(bw_report, "reads");
-	sprintf(bm_type, "fill_buf");
-
 	if (!check_resctrlfs_support())
 		return ksft_exit_skip("resctrl FS does not exist. Enable X86_CPU_RESCTRL config option.\n");
 
@@ -291,10 +287,10 @@ int main(int argc, char **argv)
 	ksft_set_plan(tests ? : 4);
 
 	if (mbm_test)
-		run_mbm_test(benchmark_cmd, span, cpu_no, bw_report);
+		run_mbm_test(benchmark_cmd, span, cpu_no);
 
 	if (mba_test)
-		run_mba_test(benchmark_cmd, cpu_no, bw_report);
+		run_mba_test(benchmark_cmd, cpu_no);
 
 	if (cmt_test)
 		run_cmt_test(benchmark_cmd, cpu_no);
