diff --git a/tests/CrawlerProcess/asyncio_enabled_reactor_different_loop.py b/tests/CrawlerProcess/asyncio_enabled_reactor_different_loop.py
index 34ef00143..6fe88b011 100644
--- a/tests/CrawlerProcess/asyncio_enabled_reactor_different_loop.py
+++ b/tests/CrawlerProcess/asyncio_enabled_reactor_different_loop.py
@@ -24,5 +24,6 @@ process = CrawlerProcess(
         "ASYNCIO_EVENT_LOOP": "uvloop.Loop",
     }
 )
-process.crawl(NoRequestsSpider)
+d = process.crawl(NoRequestsSpider)
+d.addErrback(lambda failure: failure.printTraceback())
 process.start()
diff --git a/tests/CrawlerProcess/reactor_default_twisted_reactor_select.py b/tests/CrawlerProcess/reactor_default_twisted_reactor_select.py
index 744b4ecb5..091e9d424 100644
--- a/tests/CrawlerProcess/reactor_default_twisted_reactor_select.py
+++ b/tests/CrawlerProcess/reactor_default_twisted_reactor_select.py
@@ -17,5 +17,6 @@ process = CrawlerProcess(
     }
 )
 
-process.crawl(NoRequestsSpider)
+d = process.crawl(NoRequestsSpider)
+d.addErrback(lambda failure: failure.printTraceback())
 process.start()
diff --git a/tests/CrawlerProcess/reactor_select_subclass_twisted_reactor_select.py b/tests/CrawlerProcess/reactor_select_subclass_twisted_reactor_select.py
index a8f707841..5615e7a68 100644
--- a/tests/CrawlerProcess/reactor_select_subclass_twisted_reactor_select.py
+++ b/tests/CrawlerProcess/reactor_select_subclass_twisted_reactor_select.py
@@ -26,5 +26,6 @@ process = CrawlerProcess(
     }
 )
 
-process.crawl(NoRequestsSpider)
+d = process.crawl(NoRequestsSpider)
+d.addErrback(lambda failure: failure.printTraceback())
 process.start()
diff --git a/tests/CrawlerProcess/twisted_reactor_custom_settings_conflict.py b/tests/CrawlerProcess/twisted_reactor_custom_settings_conflict.py
index 19cc08be6..7074a7389 100644
--- a/tests/CrawlerProcess/twisted_reactor_custom_settings_conflict.py
+++ b/tests/CrawlerProcess/twisted_reactor_custom_settings_conflict.py
@@ -17,6 +17,8 @@ class AsyncioReactorSpider(scrapy.Spider):
 
 
 process = CrawlerProcess()
-process.crawl(SelectReactorSpider)
-process.crawl(AsyncioReactorSpider)
+d1 = process.crawl(SelectReactorSpider)
+d1.addErrback(lambda failure: failure.printTraceback())
+d2 = process.crawl(AsyncioReactorSpider)
+d2.addErrback(lambda failure: failure.printTraceback())
 process.start()