diff --git a/tools/find_build_apps/cmake.py b/tools/find_build_apps/cmake.py
index 081de53ea..ab4a842ad 100644
--- a/tools/find_build_apps/cmake.py
+++ b/tools/find_build_apps/cmake.py
@@ -15,28 +15,19 @@ IDF_PY = "idf.py"
 CMAKE_PROJECT_LINE = r"include($ENV{IDF_PATH}/tools/cmake/project.cmake)"
 
 SUPPORTED_TARGETS_REGEX = re.compile(r'Supported [Tt]argets((?:[\s|]+(?:ESP[0-9A-Z\-]+))+)')
-SDKCONFIG_LINE_REGEX = re.compile(r"^([^=]+)=\"?([^\"\n]*)\"?\n*$")
 
 FORMAL_TO_USUAL = {
     'ESP32': 'esp32',
     'ESP32-S2': 'esp32s2',
 }
 
-# If these keys are present in sdkconfig.defaults, they will be extracted and passed to CMake
-SDKCONFIG_TEST_OPTS = [
-    "EXCLUDE_COMPONENTS",
-    "TEST_EXCLUDE_COMPONENTS",
-    "TEST_COMPONENTS",
-    "TEST_GROUPS"
-]
-
 
 class CMakeBuildSystem(BuildSystem):
     NAME = BUILD_SYSTEM_CMAKE
 
-    @staticmethod
-    def build(build_item):  # type: (BuildItem) -> None
-        build_path, work_path = BuildSystem.build_prepare(build_item)
+    @classmethod
+    def build(cls, build_item):  # type: (BuildItem) -> None
+        build_path, work_path, extra_cmakecache_items = cls.build_prepare(build_item)
         # Prepare the build arguments
         args = [
             # Assume it is the responsibility of the caller to
@@ -48,11 +39,12 @@ class CMakeBuildSystem(BuildSystem):
             work_path,
             "-DIDF_TARGET=" + build_item.target,
         ]
-        for key, val in extra_cmakecache_items.items():
-            args.append("-D{}={}".format(key, val))
-        if "TEST_EXCLUDE_COMPONENTS" in extra_cmakecache_items \
-                and "TEST_COMPONENTS" not in extra_cmakecache_items:
-            args.append("-DTESTS_ALL=1")
+        if extra_cmakecache_items:
+            for key, val in extra_cmakecache_items.items():
+                args.append("-D{}={}".format(key, val))
+            if "TEST_EXCLUDE_COMPONENTS" in extra_cmakecache_items \
+                    and "TEST_COMPONENTS" not in extra_cmakecache_items:
+                args.append("-DTESTS_ALL=1")
         if build_item.verbose:
             args.append("-v")
         args.append("build")
diff --git a/tools/find_build_apps/common.py b/tools/find_build_apps/common.py
index 867bb0c17..3faf5341b 100644
--- a/tools/find_build_apps/common.py
+++ b/tools/find_build_apps/common.py
@@ -17,6 +17,16 @@ NAME_PLACEHOLDER = "@n"
 FULL_NAME_PLACEHOLDER = "@f"
 INDEX_PLACEHOLDER = "@i"
 
+SDKCONFIG_LINE_REGEX = re.compile(r"^([^=]+)=\"?([^\"\n]*)\"?\n*$")
+
+# If these keys are present in sdkconfig.defaults, they will be extracted and passed to CMake
+SDKCONFIG_TEST_OPTS = [
+    "EXCLUDE_COMPONENTS",
+    "TEST_EXCLUDE_COMPONENTS",
+    "TEST_COMPONENTS",
+    "TEST_GROUPS"
+]
+
 # ConfigRule represents one --config argument of find_apps.py.
 # file_name is the name of the sdkconfig file fragment, optionally with a single wildcard ('*' character).
 # file_name can also be empty to indicate that the default configuration of the app should be used.
@@ -195,12 +205,11 @@ class BuildSystem(object):
     Derived classes implement the methods below.
     Objects of these classes aren't instantiated, instead the class (type object) is used.
     """
-
     NAME = "undefined"
     SUPPORTED_TARGETS_REGEX = re.compile(r'Supported [Tt]argets((?:[\s|]+(?:ESP[0-9A-Z\-]+))+)')
 
-    @staticmethod
-    def build_prepare(build_item):
+    @classmethod
+    def build_prepare(cls, build_item):
         app_path = build_item.app_dir
         work_path = build_item.work_dir or app_path
         if not build_item.build_dir:
@@ -244,6 +253,7 @@ class BuildSystem(object):
                 os.unlink(sdkconfig_file)
 
         logging.debug("Creating sdkconfig file: {}".format(sdkconfig_file))
+        extra_cmakecache_items = {}
         if not build_item.dry_run:
             with open(sdkconfig_file, "w") as f_out:
                 for sdkconfig_name in sdkconfig_defaults_list:
@@ -255,13 +265,12 @@ class BuildSystem(object):
                         for line in f_in:
                             if not line.endswith("\n"):
                                 line += "\n"
+                            if cls.NAME == 'cmake':
+                                m = SDKCONFIG_LINE_REGEX.match(line)
+                                if m and m.group(1) in SDKCONFIG_TEST_OPTS:
+                                    extra_cmakecache_items[m.group(1)] = m.group(2)
+                                    continue
                             f_out.write(os.path.expandvars(line))
-            # Also save the sdkconfig file in the build directory
-            shutil.copyfile(
-                os.path.join(work_path, "sdkconfig"),
-                os.path.join(build_path, "sdkconfig"),
-            )
-
         else:
             for sdkconfig_name in sdkconfig_defaults_list:
                 sdkconfig_path = os.path.join(app_path, sdkconfig_name)
@@ -273,7 +282,10 @@ class BuildSystem(object):
                 logging.debug("Appending {} to sdkconfig".format(sdkconfig_name))
 
         # The preparation of build is finished. Implement the build part in sub classes.
-        return build_path, work_path
+        if cls.NAME == 'cmake':
+            return build_path, work_path, extra_cmakecache_items
+        else:
+            return build_path, work_path
 
     @staticmethod
     @abstractmethod
diff --git a/tools/find_build_apps/make.py b/tools/find_build_apps/make.py
index 239f15469..a8b153fd0 100644
--- a/tools/find_build_apps/make.py
+++ b/tools/find_build_apps/make.py
@@ -20,9 +20,9 @@ except NameError:
 class MakeBuildSystem(BuildSystem):
     NAME = BUILD_SYSTEM_MAKE
 
-    @staticmethod
-    def build(build_item):
-        build_path, work_path = BuildSystem.build_prepare(build_item)
+    @classmethod
+    def build(cls, build_item):
+        build_path, work_path = cls.build_prepare(build_item)
         commands = [
             'make clean',
             'make defconfig',