diff --git a/src/tests.c b/src/tests.c
index b0c4ce5..165a2de 100644
--- a/src/tests.c
+++ b/src/tests.c
@@ -25,13 +25,28 @@ struct test_params {
 	char *filename;
 	uint8_t *buffer;
 	uint64_t byte_count;
+
+	bool inner_malloc;
 };
 
 struct testcase {
 	char *name;
 	test_cb cb;
+	bool inner_malloc;
 };
 
+void handle_buffer_malloc(struct test_params *params) {
+	if (params->inner_malloc) {
+		params->buffer = malloc(sizeof(uint8_t) * params->byte_count);
+	}
+}
+
+void handle_buffer_free(struct test_params *params) {
+	if (params->inner_malloc) {
+		free(params->buffer);
+	}
+}
+
 void test_fread(struct repetition_tester *tester, void *user)
 {
 	struct test_params *params = user;
@@ -41,6 +56,8 @@ void test_fread(struct repetition_tester *tester, void *user)
 		return;
 	}
 
+	handle_buffer_malloc(params);
+
 	repetition_time_start(tester);
 	int result = fread(params->buffer, params->byte_count, 1, f);
 	repetition_time_end(tester);
@@ -52,6 +69,7 @@ void test_fread(struct repetition_tester *tester, void *user)
 	repetition_count_bytes(tester, params->byte_count);
 
 err:
+	handle_buffer_free(params);
 	fclose(f);
 }
 
@@ -64,6 +82,8 @@ void test_read(struct repetition_tester *tester, void *user)
 		return;
 	}
 
+	handle_buffer_malloc(params);
+
 	repetition_time_start(tester);
 	int result = read(fd, params->buffer, params->byte_count);
 	repetition_time_end(tester);
@@ -75,6 +95,7 @@ void test_read(struct repetition_tester *tester, void *user)
 	repetition_count_bytes(tester, result);
 
 err:
+	handle_buffer_free(params);
 	close(fd);
 }
 
@@ -87,16 +108,12 @@ int main()
 	char *filename = "data_10000000.json";
 	uint64_t file_size = get_file_size(filename);
 
-	uint8_t *buffer = malloc(sizeof(uint8_t) * file_size);
-	struct test_params params = {
-		.filename = filename,
-		.buffer = buffer,
-		.byte_count = file_size
-	};
 
 	struct testcase cases[] = {
-		{ .name = "fread", .cb = test_fread },
-		{ .name = "read", .cb = test_read },
+		{ .name = "read inner malloc", .cb = test_read, .inner_malloc = true },
+		{ .name = "read outer malloc", .cb = test_read, .inner_malloc = false },
+		{ .name = "fread inner malloc", .cb = test_fread, .inner_malloc = true },
+		{ .name = "fread outer malloc", .cb = test_fread, .inner_malloc = false },
 	};
 
 	struct repetition_results results = { 0 };
@@ -104,16 +121,31 @@ int main()
 		for (int i = 0; i < ARRAY_LEN(cases); i++) {
 			struct testcase *testcase = &cases[i];
 
+			uint8_t *buffer = NULL;
+			if (!testcase->inner_malloc) {
+				buffer = malloc(sizeof(uint8_t) * file_size);
+			}
+
+			struct test_params params = {
+				.filename = filename,
+				.buffer = buffer,
+				.byte_count = file_size,
+				.inner_malloc = testcase->inner_malloc
+			};
+
+
 			if (repetition_test_run(&tester, file_size, &results, testcase->cb, &params)) {
 				return -1;
 			}
 			printf("----- %s -----\n", testcase->name);
 			print_repetition_results(&tester, &results);
 			printf("\n");
+
+			if (!testcase->inner_malloc) {
+				free(buffer);
+			}
 		}
 	}
 
-	free(buffer);
-
 	return 0;
 }