diff --git a/Tests/RunCMake/target_sources/CMakeLists.txt b/Tests/RunCMake/target_sources/CMakeLists.txt
index 727f93a925..296fdda5aa 100644
--- a/Tests/RunCMake/target_sources/CMakeLists.txt
+++ b/Tests/RunCMake/target_sources/CMakeLists.txt
@@ -1,3 +1,3 @@
 cmake_minimum_required(VERSION 3.11)
 project(${RunCMake_TEST} LANGUAGES NONE)
-include(${RunCMake_TEST}.cmake)
+include(${RunCMake_TEST}.cmake NO_POLICY_SCOPE)
diff --git a/Tests/RunCMake/target_sources/MissingSource-result.txt b/Tests/RunCMake/target_sources/MissingSource-result.txt
new file mode 100644
index 0000000000..d00491fd7e
--- /dev/null
+++ b/Tests/RunCMake/target_sources/MissingSource-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/target_sources/MissingSource-stderr.txt b/Tests/RunCMake/target_sources/MissingSource-stderr.txt
new file mode 100644
index 0000000000..b082603d8e
--- /dev/null
+++ b/Tests/RunCMake/target_sources/MissingSource-stderr.txt
@@ -0,0 +1,6 @@
+^CMake Error at MissingSource\.cmake:[0-9]+ \(add_custom_target\):
+  Cannot find source file:
+
+    missing\.txt
+Call Stack \(most recent call first\):
+  CMakeLists.txt:[0-9]+ \(include\)
diff --git a/Tests/RunCMake/target_sources/MissingSource.cmake b/Tests/RunCMake/target_sources/MissingSource.cmake
new file mode 100644
index 0000000000..2bb71e4935
--- /dev/null
+++ b/Tests/RunCMake/target_sources/MissingSource.cmake
@@ -0,0 +1,3 @@
+cmake_policy(SET CMP0115 NEW)
+add_custom_target(foo)
+target_sources(foo PRIVATE missing.txt)
diff --git a/Tests/RunCMake/target_sources/RunCMakeTest.cmake b/Tests/RunCMake/target_sources/RunCMakeTest.cmake
index c1314f7973..90915cd759 100644
--- a/Tests/RunCMake/target_sources/RunCMakeTest.cmake
+++ b/Tests/RunCMake/target_sources/RunCMakeTest.cmake
@@ -9,6 +9,7 @@ run_cmake(OriginDebug)
 run_cmake(CMP0026-LOCATION)
 run_cmake(CMP0076-OLD)
 run_cmake(CMP0076-WARN)
+run_cmake(MissingSource)
 run_cmake(RelativePathInInterface)
 run_cmake(RelativePathInSubdirGenEx)
 run_cmake(RelativePathInSubdirInterface)