diff --git a/tests/unit/base64/CMakeLists.txt b/tests/unit/base64/CMakeLists.txt
index 36919da9f15..e1e9d434e90 100644
--- a/tests/unit/base64/CMakeLists.txt
+++ b/tests/unit/base64/CMakeLists.txt
@@ -1,5 +1,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
+cmake_minimum_required(VERSION 3.20.0)
+
 project(base64)
 set(SOURCES main.c)
 find_package(ZephyrUnittest REQUIRED HINTS $ENV{ZEPHYR_BASE})
diff --git a/tests/unit/cbprintf/CMakeLists.txt b/tests/unit/cbprintf/CMakeLists.txt
index b5f4ed09100..da17fc20ead 100644
--- a/tests/unit/cbprintf/CMakeLists.txt
+++ b/tests/unit/cbprintf/CMakeLists.txt
@@ -1,5 +1,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
+cmake_minimum_required(VERSION 3.20.0)
+
 project(lib_os_cbprintf)
 set(SOURCES main.c)
 find_package(ZephyrUnittest REQUIRED HINTS $ENV{ZEPHYR_BASE})
diff --git a/tests/unit/crc/CMakeLists.txt b/tests/unit/crc/CMakeLists.txt
index 323a57d8ce5..a064ad29223 100644
--- a/tests/unit/crc/CMakeLists.txt
+++ b/tests/unit/crc/CMakeLists.txt
@@ -1,5 +1,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
+cmake_minimum_required(VERSION 3.20.0)
+
 project(crc)
 set(SOURCES main.c)
 find_package(ZephyrUnittest REQUIRED HINTS $ENV{ZEPHYR_BASE})
diff --git a/tests/unit/intmath/CMakeLists.txt b/tests/unit/intmath/CMakeLists.txt
index a8d4621b262..4a0b5e2eb6e 100644
--- a/tests/unit/intmath/CMakeLists.txt
+++ b/tests/unit/intmath/CMakeLists.txt
@@ -1,5 +1,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
+cmake_minimum_required(VERSION 3.20.0)
+
 project(base64)
 set(SOURCES
   main.c
diff --git a/tests/unit/list/CMakeLists.txt b/tests/unit/list/CMakeLists.txt
index 61a1357803a..3495f67415e 100644
--- a/tests/unit/list/CMakeLists.txt
+++ b/tests/unit/list/CMakeLists.txt
@@ -1,5 +1,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
+cmake_minimum_required(VERSION 3.20.0)
+
 project(list)
 set(SOURCES
   main.c
diff --git a/tests/unit/math_extras/CMakeLists.txt b/tests/unit/math_extras/CMakeLists.txt
index 5c2fec54398..1cbbc11c7cb 100644
--- a/tests/unit/math_extras/CMakeLists.txt
+++ b/tests/unit/math_extras/CMakeLists.txt
@@ -1,5 +1,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
+cmake_minimum_required(VERSION 3.20.0)
+
 project(math_extras)
 set(SOURCES main.c portable.c)
 find_package(ZephyrUnittest REQUIRED HINTS $ENV{ZEPHYR_BASE})
diff --git a/tests/unit/net_timeout/CMakeLists.txt b/tests/unit/net_timeout/CMakeLists.txt
index 4edcb61e5f9..2c497986579 100644
--- a/tests/unit/net_timeout/CMakeLists.txt
+++ b/tests/unit/net_timeout/CMakeLists.txt
@@ -1,5 +1,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
+cmake_minimum_required(VERSION 3.20.0)
+
 project(lib_net_timeout)
 set(SOURCES main.c)
 find_package(ZephyrUnittest REQUIRED HINTS $ENV{ZEPHYR_BASE})
diff --git a/tests/unit/rbtree/CMakeLists.txt b/tests/unit/rbtree/CMakeLists.txt
index daeafb18be1..55dad5ba00e 100644
--- a/tests/unit/rbtree/CMakeLists.txt
+++ b/tests/unit/rbtree/CMakeLists.txt
@@ -1,5 +1,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
+cmake_minimum_required(VERSION 3.20.0)
+
 project(rbtree)
 set(SOURCES main.c)
 find_package(ZephyrUnittest REQUIRED HINTS $ENV{ZEPHYR_BASE})
diff --git a/tests/unit/timeutil/CMakeLists.txt b/tests/unit/timeutil/CMakeLists.txt
index 5a60184a0c3..b01305bd586 100644
--- a/tests/unit/timeutil/CMakeLists.txt
+++ b/tests/unit/timeutil/CMakeLists.txt
@@ -1,6 +1,8 @@
 # Copyright 2019-2020 Peter Bigot Consulting
 # SPDX-License-Identifier: Apache-2.0
 
+cmake_minimum_required(VERSION 3.20.0)
+
 project(timeutil)
 set(SOURCES main.c test_gmtime.c test_s32.c test_s64.c test_sync.c)
 find_package(ZephyrUnittest REQUIRED HINTS $ENV{ZEPHYR_BASE})
diff --git a/tests/unit/util/CMakeLists.txt b/tests/unit/util/CMakeLists.txt
index debb233a819..3b5099a37f7 100644
--- a/tests/unit/util/CMakeLists.txt
+++ b/tests/unit/util/CMakeLists.txt
@@ -1,5 +1,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
+cmake_minimum_required(VERSION 3.20.0)
+
 project(util)
 set(SOURCES main.c maincxx.cxx ../../../lib/os/dec.c)
 find_package(ZephyrUnittest REQUIRED HINTS $ENV{ZEPHYR_BASE})