diff --git a/Tests/RunCMake/CommandLine/B-S-extra-path-stderr.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-B-S-extra-path-stderr.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/B-S-extra-path-stderr.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-B-S-extra-path-stderr.txt
diff --git a/Tests/RunCMake/CommandLine/B-no-arg-result.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-B-no-arg-result.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/B-no-arg-result.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-B-no-arg-result.txt
diff --git a/Tests/RunCMake/CommandLine/B-no-arg-stderr.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-B-no-arg-stderr.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/B-no-arg-stderr.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-B-no-arg-stderr.txt
diff --git a/Tests/RunCMake/CommandLine/B-no-arg2-result.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-B-no-arg2-result.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/B-no-arg2-result.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-B-no-arg2-result.txt
diff --git a/Tests/RunCMake/CommandLine/B-no-arg2-stderr.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-B-no-arg2-stderr.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/B-no-arg2-stderr.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-B-no-arg2-stderr.txt
diff --git a/Tests/RunCMake/CommandLine/B-no-arg3-result.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-B-no-arg3-result.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/B-no-arg3-result.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-B-no-arg3-result.txt
diff --git a/Tests/RunCMake/CommandLine/B-no-arg3-stderr.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-B-no-arg3-stderr.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/B-no-arg3-stderr.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-B-no-arg3-stderr.txt
diff --git a/Tests/RunCMake/CommandLine/C_buildsrcdir-stderr.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-C_buildsrcdir-stderr.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/C_buildsrcdir-stderr.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-C_buildsrcdir-stderr.txt
diff --git a/Tests/RunCMake/CommandLine/C_buildsrcdir-stdout.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-C_buildsrcdir-stdout.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/C_buildsrcdir-stdout.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-C_buildsrcdir-stdout.txt
diff --git a/Tests/RunCMake/CommandLine/C_buildsrcdir.cmake b/Tests/RunCMake/CommandLine/ExplicitDirs-C_buildsrcdir.cmake
similarity index 100%
rename from Tests/RunCMake/CommandLine/C_buildsrcdir.cmake
rename to Tests/RunCMake/CommandLine/ExplicitDirs-C_buildsrcdir.cmake
diff --git a/Tests/RunCMake/CommandLine/S-B-extra-path-stderr.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-S-B-extra-path-stderr.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/S-B-extra-path-stderr.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-S-B-extra-path-stderr.txt
diff --git a/Tests/RunCMake/CommandLine/S-B-non-path-stderr.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-S-B-non-path-stderr.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/S-B-non-path-stderr.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-S-B-non-path-stderr.txt
diff --git a/Tests/RunCMake/CommandLine/S-B-non-path2-stderr.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-S-B-non-path2-stderr.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/S-B-non-path2-stderr.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-S-B-non-path2-stderr.txt
diff --git a/Tests/RunCMake/CommandLine/S-S-Sdiffers-stderr.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-S-S-Sdiffers-stderr.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/S-S-Sdiffers-stderr.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-S-S-Sdiffers-stderr.txt
diff --git a/Tests/RunCMake/CommandLine/S-S-Simplicit-stderr.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-S-S-Simplicit-stderr.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/S-S-Simplicit-stderr.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-S-S-Simplicit-stderr.txt
diff --git a/Tests/RunCMake/CommandLine/S-S-differs-stderr.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-S-S-differs-stderr.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/S-S-differs-stderr.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-S-S-differs-stderr.txt
diff --git a/Tests/RunCMake/CommandLine/S-implicit-differs-stderr.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-S-implicit-differs-stderr.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/S-implicit-differs-stderr.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-S-implicit-differs-stderr.txt
diff --git a/Tests/RunCMake/CommandLine/S-implicit-differs2-stderr.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-S-implicit-differs2-stderr.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/S-implicit-differs2-stderr.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-S-implicit-differs2-stderr.txt
diff --git a/Tests/RunCMake/CommandLine/S-implicit-differs3-stderr.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-S-implicit-differs3-stderr.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/S-implicit-differs3-stderr.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-S-implicit-differs3-stderr.txt
diff --git a/Tests/RunCMake/CommandLine/S-no-arg-result.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-S-no-arg-result.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/S-no-arg-result.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-S-no-arg-result.txt
diff --git a/Tests/RunCMake/CommandLine/S-no-arg-stderr.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-S-no-arg-stderr.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/S-no-arg-stderr.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-S-no-arg-stderr.txt
diff --git a/Tests/RunCMake/CommandLine/S-no-arg2-result.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-S-no-arg2-result.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/S-no-arg2-result.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-S-no-arg2-result.txt
diff --git a/Tests/RunCMake/CommandLine/S-no-arg2-stderr.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-S-no-arg2-stderr.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/S-no-arg2-stderr.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-S-no-arg2-stderr.txt
diff --git a/Tests/RunCMake/CommandLine/S-no-arg3-result.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-S-no-arg3-result.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/S-no-arg3-result.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-S-no-arg3-result.txt
diff --git a/Tests/RunCMake/CommandLine/S-no-arg3-stderr.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-S-no-arg3-stderr.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/S-no-arg3-stderr.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-S-no-arg3-stderr.txt
diff --git a/Tests/RunCMake/CommandLine/no-S-B-stderr.txt b/Tests/RunCMake/CommandLine/ExplicitDirs-no-S-B-stderr.txt
similarity index 100%
rename from Tests/RunCMake/CommandLine/no-S-B-stderr.txt
rename to Tests/RunCMake/CommandLine/ExplicitDirs-no-S-B-stderr.txt
diff --git a/Tests/RunCMake/CommandLine/RunCMakeTest.cmake b/Tests/RunCMake/CommandLine/RunCMakeTest.cmake
index 17adefd482..727373aaef 100644
--- a/Tests/RunCMake/CommandLine/RunCMakeTest.cmake
+++ b/Tests/RunCMake/CommandLine/RunCMakeTest.cmake
@@ -132,7 +132,7 @@ project(ExplicitDirsMissing LANGUAGES NONE)
 ]=])
   set(RunCMake_TEST_SOURCE_DIR "${source_dir}")
   set(RunCMake_TEST_BINARY_DIR "${source_dir}")
-  run_cmake_with_options(no-S-B -DFOO=BAR)
+  run_cmake_with_options(ExplicitDirs-no-S-B -DFOO=BAR)
 
   file(WRITE ${source_dir}/CMakeLists.txt [=[
 cmake_minimum_required(VERSION 3.13)
@@ -144,12 +144,12 @@ endif()
 
   file(REMOVE_RECURSE "${source_dir}/build")
   # Test with a setup where binary_dir won't be created by `run_cmake_with_options`
-  run_cmake_with_options(S-arg-build-dir-not-created -S ${source_dir} build/)
-  run_cmake_with_options(S-arg-reverse-build-dir-not-created build/ -S${source_dir} )
+  run_cmake_with_options(ExplicitDirs-S-arg-build-dir-not-created -S ${source_dir} build/)
+  run_cmake_with_options(ExplicitDirs-S-arg-reverse-build-dir-not-created build/ -S${source_dir} )
 
   file(REMOVE_RECURSE "${source_dir}/build")
   file(MAKE_DIRECTORY "${source_dir}/build")
-  run_cmake_with_options(S-arg-build-dir-empty -S ${source_dir} build/)
+  run_cmake_with_options(ExplicitDirs-S-arg-build-dir-empty -S ${source_dir} build/)
 
   set(source_dir ${RunCMake_SOURCE_DIR}/ExplicitDirs)
   set(binary_dir ${RunCMake_BINARY_DIR}/ExplicitDirs-build)
@@ -158,48 +158,48 @@ endif()
   set(RunCMake_TEST_BINARY_DIR "${binary_dir}")
 
   file(REMOVE_RECURSE "${binary_dir}")
-  run_cmake_with_options(S-arg -S ${source_dir} ${binary_dir})
-  run_cmake_with_options(S-arg-reverse-order ${binary_dir} -S${source_dir} )
-  run_cmake_with_options(S-no-arg -S )
-  run_cmake_with_options(S-no-arg2 -S -T)
-  run_cmake_with_raw_args(S-no-arg3 [[-S ""]])
-  run_cmake_with_options(S-B -S ${source_dir} -B ${binary_dir})
-  run_cmake_with_options(S-B-extra-path -S ${source_dir} -B ${binary_dir} /extra/path/)
-  run_cmake_with_raw_args(S-B-non-path "-S \"${source_dir}\" -B \"${binary_dir}\" \"\"")
-  run_cmake_with_raw_args(S-B-non-path2 "-S \"${source_dir}\" \"\" -B \"${binary_dir}\"")
+  run_cmake_with_options(ExplicitDirs-S-arg -S ${source_dir} ${binary_dir})
+  run_cmake_with_options(ExplicitDirs-S-arg-reverse-order ${binary_dir} -S${source_dir} )
+  run_cmake_with_options(ExplicitDirs-S-no-arg -S )
+  run_cmake_with_options(ExplicitDirs-S-no-arg2 -S -T)
+  run_cmake_with_raw_args(ExplicitDirs-S-no-arg3 [[-S ""]])
+  run_cmake_with_options(ExplicitDirs-S-B -S ${source_dir} -B ${binary_dir})
+  run_cmake_with_options(ExplicitDirs-S-B-extra-path -S ${source_dir} -B ${binary_dir} /extra/path/)
+  run_cmake_with_raw_args(ExplicitDirs-S-B-non-path "-S \"${source_dir}\" -B \"${binary_dir}\" \"\"")
+  run_cmake_with_raw_args(ExplicitDirs-S-B-non-path2 "-S \"${source_dir}\" \"\" -B \"${binary_dir}\"")
 
   file(REMOVE_RECURSE "${binary_dir}/other_dir")
   file(MAKE_DIRECTORY "${binary_dir}/other_dir")
   file(WRITE "${binary_dir}/other_dir/CMakeLists.txt" [=[ ]=])
-  run_cmake_with_options(S-S-same -S ${source_dir} -S ${source_dir} -B ${binary_dir})
-  run_cmake_with_options(S-S-differs -S ${binary_dir}/other_dir -S ${source_dir} -B ${binary_dir})
-  run_cmake_with_options(S-implicit-same -S ${source_dir} ${source_dir} -B ${binary_dir})
-  run_cmake_with_options(S-implicit-differs -S ${source_dir} ${binary_dir}/other_dir -B ${binary_dir})
-  run_cmake_with_options(S-implicit-differs2 ${binary_dir}/other_dir -S ${source_dir} -B ${binary_dir})
-  run_cmake_with_options(S-implicit-differs3 ${binary_dir}/other_dir ${source_dir} -B ${binary_dir})
-  run_cmake_with_options(S-S-Sdiffers -S ${binary_dir}/other_dir1 -S ${binary_dir}/other_dir2 -S ${source_dir} -B ${binary_dir})
-  run_cmake_with_options(S-S-Simplicit ${binary_dir}/other_dir1 ${binary_dir}/other_dir2 ${source_dir} -B ${binary_dir})
+  run_cmake_with_options(ExplicitDirs-S-S-same -S ${source_dir} -S ${source_dir} -B ${binary_dir})
+  run_cmake_with_options(ExplicitDirs-S-S-differs -S ${binary_dir}/other_dir -S ${source_dir} -B ${binary_dir})
+  run_cmake_with_options(ExplicitDirs-S-implicit-same -S ${source_dir} ${source_dir} -B ${binary_dir})
+  run_cmake_with_options(ExplicitDirs-S-implicit-differs -S ${source_dir} ${binary_dir}/other_dir -B ${binary_dir})
+  run_cmake_with_options(ExplicitDirs-S-implicit-differs2 ${binary_dir}/other_dir -S ${source_dir} -B ${binary_dir})
+  run_cmake_with_options(ExplicitDirs-S-implicit-differs3 ${binary_dir}/other_dir ${source_dir} -B ${binary_dir})
+  run_cmake_with_options(ExplicitDirs-S-S-Sdiffers -S ${binary_dir}/other_dir1 -S ${binary_dir}/other_dir2 -S ${source_dir} -B ${binary_dir})
+  run_cmake_with_options(ExplicitDirs-S-S-Simplicit ${binary_dir}/other_dir1 ${binary_dir}/other_dir2 ${source_dir} -B ${binary_dir})
 
   # make sure that -B can explicitly construct build directories
   file(REMOVE_RECURSE "${binary_dir}")
-  run_cmake_with_options(B-arg -B ${binary_dir} ${source_dir})
+  run_cmake_with_options(ExplicitDirs-B-arg -B ${binary_dir} ${source_dir})
   file(REMOVE_RECURSE "${binary_dir}")
-  run_cmake_with_options(B-arg-reverse-order ${source_dir} -B${binary_dir})
-  run_cmake_with_options(B-no-arg -B )
-  run_cmake_with_options(B-no-arg2 -B -T)
-  run_cmake_with_raw_args(B-no-arg3 [[-B ""]])
+  run_cmake_with_options(ExplicitDirs-B-arg-reverse-order ${source_dir} -B${binary_dir})
+  run_cmake_with_options(ExplicitDirs-B-no-arg -B )
+  run_cmake_with_options(ExplicitDirs-B-no-arg2 -B -T)
+  run_cmake_with_raw_args(ExplicitDirs-B-no-arg3 [[-B ""]])
   file(REMOVE_RECURSE "${binary_dir}")
-  run_cmake_with_options(B-S -B${binary_dir} -S${source_dir})
-  run_cmake_with_options(B-S-extra-path -B${binary_dir} -S${source_dir} /extra/path/)
+  run_cmake_with_options(ExplicitDirs-B-S -B${binary_dir} -S${source_dir})
+  run_cmake_with_options(ExplicitDirs-B-S-extra-path -B${binary_dir} -S${source_dir} /extra/path/)
 
   message("copied to ${RunCMake_TEST_BINARY_DIR}/initial-cache.txt")
   file(COPY ${RunCMake_SOURCE_DIR}/C_buildsrcdir/initial-cache.txt DESTINATION ${RunCMake_TEST_BINARY_DIR})
 
   # CMAKE_BINARY_DIR should be determined by -B if specified, and CMAKE_SOURCE_DIR determined by -S if specified.
   # Path to initial-cache.txt is relative to the $PWD, which is normally set to ${RunCMake_TEST_BINARY_DIR}.
-  run_cmake_with_options(C_buildsrcdir -B DummyBuildDir -S ${RunCMake_SOURCE_DIR}/C_buildsrcdir/src -C initial-cache.txt)
+  run_cmake_with_options(ExplicitDirs-C_buildsrcdir -B DummyBuildDir -S ${RunCMake_SOURCE_DIR}/C_buildsrcdir/src -C initial-cache.txt)
   # Test that full path works, too.
-  run_cmake_with_options(C_buildsrcdir -B DummyBuildDir -S ${RunCMake_SOURCE_DIR}/C_buildsrcdir/src -C ${RunCMake_TEST_BINARY_DIR}/initial-cache.txt)
+  run_cmake_with_options(ExplicitDirs-C_buildsrcdir -B DummyBuildDir -S ${RunCMake_SOURCE_DIR}/C_buildsrcdir/src -C ${RunCMake_TEST_BINARY_DIR}/initial-cache.txt)
 endfunction()
 run_ExplicitDirs()