diff --git a/test/ipc/unixsocket.cpp b/test/ipc/unixsocket.cpp
index f39bd986b..0e603a69c 100644
--- a/test/ipc/unixsocket.cpp
+++ b/test/ipc/unixsocket.cpp
@@ -23,6 +23,7 @@

 #include "libcamera/internal/ipc_unixsocket.h"

+#include "misc.h"
 #include "test.h"

 #define CMD_CLOSE	0
@@ -137,11 +138,11 @@ private:
 		}

 		case CMD_JOIN: {
-			int outfd = open("/tmp", O_TMPFILE | O_RDWR,
-					 S_IRUSR | S_IWUSR);
-			if (outfd < 0) {
+			auto outfd = test::createTemporaryFile();
+			if (!outfd.isValid()) {
+				ret = errno;
 				cerr << "Create out file failed" << endl;
-				stop(outfd);
+				stop(ret);
 				return;
 			}

@@ -152,15 +153,13 @@ private:

 					if (num < 0) {
 						cerr << "Read failed" << endl;
-						close(outfd);
 						stop(-EIO);
 						return;
 					} else if (!num)
 						break;

-					if (write(outfd, buf, num) < 0) {
+					if (write(outfd.get(), buf, num) < 0) {
 						cerr << "Write failed" << endl;
-						close(outfd);
 						stop(-EIO);
 						return;
 					}
@@ -169,9 +168,9 @@ private:
 				close(fd);
 			}

-			lseek(outfd, 0, 0);
+			lseek(outfd.get(), 0, SEEK_SET);
 			response.data.push_back(CMD_JOIN);
-			response.fds.push_back(outfd);
+			response.fds.push_back(outfd.get());

 			ret = ipc_.send(response);
 			if (ret < 0) {
@@ -179,8 +178,6 @@ private:
 				stop(ret);
 			}

-			close(outfd);
-
 			break;
 		}

@@ -315,22 +312,21 @@ protected:
 			"Foo",
 			"Bar",
 		};
-		int fds[2];
+		std::array<UniqueFD, 2> fds;

 		for (unsigned int i = 0; i < std::size(strings); i++) {
 			unsigned int len = strlen(strings[i]);

-			fds[i] = open("/tmp", O_TMPFILE | O_RDWR,
-				      S_IRUSR | S_IWUSR);
-			if (fds[i] < 0)
+			fds[i] = test::createTemporaryFile();
+			if (!fds[i].isValid())
 				return TestFail;

-			ret = write(fds[i], strings[i], len);
+			ret = write(fds[i].get(), strings[i], len);
 			if (ret < 0)
 				return TestFail;

-			lseek(fds[i], 0, 0);
-			message.fds.push_back(fds[i]);
+			lseek(fds[i].get(), 0, SEEK_SET);
+			message.fds.push_back(fds[i].get());
 		}

 		message.data.push_back(CMD_JOIN);
@@ -343,8 +339,6 @@ protected:
 			unsigned int len = strlen(strings[i]);
 			std::vector<char> buf(len);

-			close(fds[i]);
-
 			if (read(response.fds[0], buf.data(), len) <= 0)
 				return TestFail;

diff --git a/test/libtest/meson.build b/test/libtest/meson.build
index 351629f3c..fd89f8047 100644
--- a/test/libtest/meson.build
+++ b/test/libtest/meson.build
@@ -3,6 +3,7 @@
 libtest_sources = files([
     'buffer_source.cpp',
     'camera_test.cpp',
+    'misc.cpp',
     'test.cpp',
 ])

diff --git a/test/libtest/misc.cpp b/test/libtest/misc.cpp
new file mode 100644
index 000000000..d4506c869
--- /dev/null
+++ b/test/libtest/misc.cpp
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2026, Ideas on Board Oy
+ *
+ * libcamera test miscellaneous utilities
+ */
+
+#include "misc.h"
+
+#include <libcamera/base/memfd.h>
+
+namespace test {
+
+libcamera::UniqueFD createTemporaryFile()
+{
+	return libcamera::MemFd::create("libcamera-test-temporary-file", 0);
+}
+
+} /* namespace test */
diff --git a/test/libtest/misc.h b/test/libtest/misc.h
new file mode 100644
index 000000000..a7b4acbeb
--- /dev/null
+++ b/test/libtest/misc.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2026, Ideas on Board Oy
+ *
+ * libcamera test miscellaneous utilities
+ */
+
+#pragma once
+
+#include <libcamera/base/unique_fd.h>
+
+namespace test {
+
+[[nodiscard]]
+libcamera::UniqueFD createTemporaryFile();
+
+}
diff --git a/test/log/log_api.cpp b/test/log/log_api.cpp
index 8d19cf0ce..684abf8b8 100644
--- a/test/log/log_api.cpp
+++ b/test/log/log_api.cpp
@@ -20,6 +20,7 @@

 #include <libcamera/logging.h>

+#include "misc.h"
 #include "test.h"

 using namespace std;
@@ -109,18 +110,17 @@ protected:

 	int testFile()
 	{
-		int fd = open("/tmp", O_TMPFILE | O_RDWR, S_IRUSR | S_IWUSR);
-		if (fd < 0) {
+		auto fd = test::createTemporaryFile();
+		if (!fd.isValid()) {
 			cerr << "Failed to open tmp log file" << endl;
 			return TestFail;
 		}

 		char path[32];
-		snprintf(path, sizeof(path), "/proc/self/fd/%u", fd);
+		snprintf(path, sizeof(path), "/proc/self/fd/%u", fd.get());

 		if (logSetFile(path) < 0) {
 			cerr << "Failed to set log file" << endl;
-			close(fd);
 			return TestFail;
 		}

@@ -128,13 +128,11 @@ protected:

 		char buf[1000];
 		memset(buf, 0, sizeof(buf));
-		lseek(fd, 0, SEEK_SET);
-		if (read(fd, buf, sizeof(buf)) < 0) {
+		lseek(fd.get(), 0, SEEK_SET);
+		if (read(fd.get(), buf, sizeof(buf)) < 0) {
 			cerr << "Failed to read tmp log file" << endl;
-			close(fd);
 			return TestFail;
 		}
-		close(fd);

 		istringstream iss(buf);
 		return verifyOutput(iss);
diff --git a/test/shared-fd.cpp b/test/shared-fd.cpp
index 57199dfe7..26e3140ad 100644
--- a/test/shared-fd.cpp
+++ b/test/shared-fd.cpp
@@ -14,6 +14,7 @@
 #include <libcamera/base/shared_fd.h>
 #include <libcamera/base/utils.h>

+#include "misc.h"
 #include "test.h"

 using namespace libcamera;
@@ -27,7 +28,7 @@ protected:
 		desc1_ = nullptr;
 		desc2_ = nullptr;

-		fd_ = open("/tmp", O_TMPFILE | O_RDWR, S_IRUSR | S_IWUSR);
+		fd_ = test::createTemporaryFile().release();
 		if (fd_ < 0)
 			return TestFail;

diff --git a/test/unique-fd.cpp b/test/unique-fd.cpp
index e556439ea..280205980 100644
--- a/test/unique-fd.cpp
+++ b/test/unique-fd.cpp
@@ -14,6 +14,7 @@
 #include <libcamera/base/unique_fd.h>
 #include <libcamera/base/utils.h>

+#include "misc.h"
 #include "test.h"

 using namespace libcamera;
@@ -189,7 +190,7 @@ protected:
 private:
 	int createFd()
 	{
-		fd_ = open("/tmp", O_TMPFILE | O_RDWR, S_IRUSR | S_IWUSR);
+		fd_ = test::createTemporaryFile().release();
 		if (fd_ < 0)
 			return TestFail;