diff --git a/tests/API/probes/CMakeLists.txt b/tests/API/probes/CMakeLists.txt
index ae3c7212a04..2ac4081ac27 100644
--- a/tests/API/probes/CMakeLists.txt
+++ b/tests/API/probes/CMakeLists.txt
@@ -38,3 +38,12 @@ target_include_directories(oval_fts_list PUBLIC
 )
 target_link_libraries(oval_fts_list openscap)
 add_oscap_test("fts.sh")
+
+add_oscap_test_executable(test_memusage
+	"test_memusage.c"
+	"${CMAKE_SOURCE_DIR}/src/common/bfind.c"
+)
+target_include_directories(test_memusage PUBLIC
+	"${CMAKE_SOURCE_DIR}/src/common"
+)
+add_oscap_test("test_memusage.sh")
diff --git a/tests/API/probes/test_memusage.c b/tests/API/probes/test_memusage.c
new file mode 100644
index 00000000000..b9db865d45d
--- /dev/null
+++ b/tests/API/probes/test_memusage.c
@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include "memusage.h"
+#include "memusage.c"
+#define OS_LINUX
+
+static int test_basic()
+{
+	size_t size;
+	char *strval = strdup("17 kB\n");
+	int ret = read_common_sizet(&size, strval);
+	free(strval);
+	return (size == 17 && ret == 0);
+}
+
+static int test_no_unit()
+{
+	size_t size;
+	char *strval = strdup("42");
+	int ret = read_common_sizet(&size, strval);
+	free(strval);
+	return (ret == -1);
+}
+
+static int test_invalid_number()
+{
+	size_t size;
+	char *strval = strdup("www kB\n");
+	int ret = read_common_sizet(&size, strval);
+	free(strval);
+	return (size == 0 && ret == 0);
+}
+
+static int test_errno()
+{
+	size_t size;
+	char *strval = strdup("17 kB\n");
+
+	/* Test that setting errno outside of the read_common_sizet function
+	 * doesn't influence the function and doesn't make the function fail.
+	 */
+	errno = EINVAL;
+
+	int ret = read_common_sizet(&size, strval);
+	free(strval);
+	return (ret != -1);
+}
+
+int main(int argc, char *argv[])
+{
+	if (!test_basic()) {
+		fprintf(stderr, "test_basic has failed\n");
+		return 1;
+	}
+	if (!test_no_unit()) {
+		fprintf(stderr, "test_no_unit has failed\n");
+		return 1;
+	}
+	if (!test_invalid_number()) {
+		fprintf(stderr, "test_invalid_number has failed\n");
+		return 1;
+	}
+	if (!test_errno()) {
+		fprintf(stderr, "test_errno has failed\n");
+		return 1;
+	}
+	return 0;
+}
diff --git a/tests/API/probes/test_memusage.sh b/tests/API/probes/test_memusage.sh
new file mode 100755
index 00000000000..4c76bdc0acf
--- /dev/null
+++ b/tests/API/probes/test_memusage.sh
@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+. $builddir/tests/test_common.sh
+
+if [ -n "${CUSTOM_OSCAP+x}" ] ; then
+    exit 255
+fi
+
+./test_memusage