diff --git a/python/helpers/pycharm/docrunner.py b/python/helpers/pycharm/docrunner.py
index baa28f002c6c..0511c8c791c1 100644
--- a/python/helpers/pycharm/docrunner.py
+++ b/python/helpers/pycharm/docrunner.py
@@ -1,4 +1,3 @@
-import imp
 import sys
 import datetime
 import os
@@ -203,6 +202,15 @@ modules = {}
 
 runner = DocTestRunner()
 
+
+def _load_file(moduleName, fileName):
+  if sys.version_info[:2] >= (3, 3):
+      from importlib import machinery
+      return machinery.SourceFileLoader(moduleName, fileName).load_module()
+  else:
+    import imp
+    return imp.load_source(moduleName, fileName)
+
 def loadSource(fileName):
   """
   loads source from fileName,
@@ -226,7 +234,7 @@ def loadSource(fileName):
       cnt += 1
     moduleName = getModuleName(prefix, cnt)
   debug("/ Loading " + fileName + " as " + moduleName)
-  module = imp.load_source(moduleName, fileName)
+  module = _load_file(moduleName, fileName)
   modules[moduleName] = module
   return module
 
@@ -349,4 +357,4 @@ if __name__ == "__main__":
 
   debug("/ Loaded " + str(runner.countTests()) + " tests")
   TeamcityServiceMessages(sys.stdout).testCount(runner.countTests())
-  runner.start()
\ No newline at end of file
+  runner.start()
diff --git a/python/testSrc/com/jetbrains/env/ut/PyDocTestProcessRunner.java b/python/testSrc/com/jetbrains/env/ut/PyDocTestProcessRunner.java
index 0e4ca2cd8cea..a54917e2ac5f 100644
--- a/python/testSrc/com/jetbrains/env/ut/PyDocTestProcessRunner.java
+++ b/python/testSrc/com/jetbrains/env/ut/PyDocTestProcessRunner.java
@@ -20,6 +20,8 @@ import com.jetbrains.python.testing.PythonTestConfigurationType;
 import com.jetbrains.python.testing.doctest.PythonDocTestRunConfiguration;
 import org.jetbrains.annotations.NotNull;
 
+import java.io.IOException;
+
 /**
  * {@link ProcessWithConsoleRunner} to run doctest
  *
@@ -30,4 +32,10 @@ public class PyDocTestProcessRunner extends PyScriptTestProcessRunner<PythonDocT
     super(PythonTestConfigurationType.getInstance().PY_DOCTEST_FACTORY,
           PythonDocTestRunConfiguration.class, scriptName, timesToRerunFailedTests);
   }
+
+  @Override
+  protected void configurationCreatedAndWillLaunch(@NotNull final PythonDocTestRunConfiguration configuration) throws IOException {
+    super.configurationCreatedAndWillLaunch(configuration);
+    configuration.setInterpreterOptions(configuration.getInterpreterOptions() + " -W error");
+  }
 }