diff --git a/example_package/config.yml b/example_package/config.yml
index c92d203d..ea26639d 100644
--- a/example_package/config.yml
+++ b/example_package/config.yml
@@ -58,6 +58,10 @@ override_limits:
 
 # extra_compilation_files: ['__ID__lib.cpp', '__ID__lib.py']
 
+# Alternative interactor used for running test runs in interactive via IO tasks. Not required. If not provided and
+# the task is interactive via IO (and has test runs configured), then the default interactor will be used.
+testrun_soc: __ID__soc_testrun.soc
+
 
 ### Keys used by sinol-make:
 
diff --git a/src/sinol_make/commands/export/__init__.py b/src/sinol_make/commands/export/__init__.py
index 4d3dee07..218e0b8b 100644
--- a/src/sinol_make/commands/export/__init__.py
+++ b/src/sinol_make/commands/export/__init__.py
@@ -288,6 +288,12 @@ def run(self, args: argparse.Namespace):
         config = package_util.get_config()
         package_util.validate_fake_time(config)
 
+        testrun_soc = config.get('testrun_soc', None)
+        if testrun_soc is not None:
+            if not os.path.exists(os.path.join(os.getcwd(), "prog", testrun_soc)):
+                util.exit_with_error(f"Testrun interactor file `{testrun_soc}` does not exist. "
+                                     f"It should be in `prog` directory.")
+
         export_package_path = paths.get_cache_path('export', self.task_id)
         if os.path.exists(export_package_path):
             shutil.rmtree(export_package_path)
diff --git a/src/sinol_make/commands/verify/__init__.py b/src/sinol_make/commands/verify/__init__.py
index 44d2fa1f..8320dabc 100644
--- a/src/sinol_make/commands/verify/__init__.py
+++ b/src/sinol_make/commands/verify/__init__.py
@@ -77,7 +77,7 @@ def remove_cache(self):
 
     def check_extra_files(self):
         """
-        Checks if extra_compilation_files and extra_execution_files exist.
+        Checks if extra_compilation_files, extra_execution_files and testrun_soc exist.
         """
         extra_compilation_files = self.config.get('extra_compilation_files', [])
         for file in extra_compilation_files:
@@ -96,6 +96,12 @@ def check_extra_files(self):
         if extra_execution_files:
             print(util.info("All extra execution files exist."))
 
+        testrun_soc = self.config.get('testrun_soc', None)
+        if testrun_soc is not None:
+            if not os.path.exists(os.path.join(os.getcwd(), "prog", testrun_soc)):
+                util.exit_with_error(f"Testrun interactor file `{testrun_soc}` does not exist. "
+                                     f"It should be in `prog` directory.")
+
     def verify_scores(self, scored_groups):
         config_scores = self.config.get('scores', {})
         if not config_scores:
diff --git a/src/sinol_make/util.py b/src/sinol_make/util.py
index 51622676..10098944 100644
--- a/src/sinol_make/util.py
+++ b/src/sinol_make/util.py
@@ -96,6 +96,7 @@ def save_config(config):
         "sinol_undocumented_time_tool",
         "sinol_undocumented_test_limits",
         "fake_time",
+        "testrun_soc",
         "num_processes",
         "memory_limit",
         "memory_limits",