Isolate test target

platformio/builder/main.py

@@ -133,7 +133,7 @@ env.SConscriptChdir(0)
 env.SConsignFile(join("$PROJECTPIOENVS_DIR", ".sconsign.dblite"))
 env.SConscript("$BUILD_SCRIPT")
 
-AlwaysBuild(env.Alias("test", DEFAULT_TARGETS + ["size"]))
+AlwaysBuild(env.Alias("__test", DEFAULT_TARGETS + ["size"]))
 
 if "UPLOAD_FLAGS" in env:
     env.Append(UPLOADERFLAGS=["$UPLOAD_FLAGS"])

platformio/builder/tools/platformio.py

@@ -86,7 +86,7 @@ def BuildProgram(env):
             src_filter=env.get("SRC_FILTER"),
             duplicate=False))
 
-    if "test" in COMMAND_LINE_TARGETS:
+    if "__test" in COMMAND_LINE_TARGETS:
         env.Append(PIOBUILDFILES=env.ProcessTest())
 
     if not env['PIOBUILDFILES'] and not COMMAND_LINE_TARGETS: