diff --git a/conan/packager.py b/conan/packager.py
index 51e886b7..b0aa6046 100644
--- a/conan/packager.py
+++ b/conan/packager.py
@@ -90,8 +90,8 @@ def __init__(self, args=None, username=None, channel=None, runner=None,
             self.default_apple_clang_versions
 
         self.mingw_configurations = mingw_configurations or get_mingw_config_from_env()
-        self.mingw_installer_reference = ConanFileReference.loads(os.getenv("CONAN_MINGW_INSTALLER_REFERENCE") or \
-            "mingw_installer/0.1@lasote/testing")
+        self.mingw_installer_reference = ConanFileReference.loads(os.getenv("CONAN_MINGW_INSTALLER_REFERENCE") or
+                                                                  "mingw_installer/0.1@lasote/testing")
 
         self.archs = archs or \
             list(filter(None, os.getenv("CONAN_ARCHS", "").split(","))) or \
diff --git a/conan/test_package_runner.py b/conan/test_package_runner.py
index 13ede95f..557b68ec 100644
--- a/conan/test_package_runner.py
+++ b/conan/test_package_runner.py
@@ -42,9 +42,18 @@ def run(self):
 
         self._run_test_package(pre_command=pre_command)
 
+    def _detected_compiler_override(self):
+        """If the user has specified some env var with CC or CXX"""
+        data = self._profile.env_values.data
+        for _, dict_envs in data.items():
+            if "CC" in dict_envs or "CXX" in dict_envs:
+                logger.debug("Override compiler by CC or CXX, skipping compiler check")
+                return True
+        return False
+
     def _run_test_package(self, pre_command=None):
         settings = collections.OrderedDict(sorted(self.settings.items()))
-        if platform.system() != "Windows":
+        if not self._detected_compiler_override() and platform.system() != "Windows":
             if settings.get("compiler", None) and settings.get("compiler.version", None):
                 conan_compiler, conan_compiler_version = self.conan_compiler_info()
                 if conan_compiler != settings.get("compiler", None) or \
diff --git a/setup.py b/setup.py
index 80be8e77..f1d268f8 100644
--- a/setup.py
+++ b/setup.py
@@ -25,7 +25,7 @@ def get_requires(filename):
     # Versions should comply with PEP440.  For a discussion on single-sourcing
     # the version across setup.py and the project code, see
     # https://packaging.python.org/en/latest/single_source_version.html
-    version="0.3.0",
+    version="0.3.1",
 
     description='Packaging tools for Conan C/C++ package manager',