diff --git a/.gitignore b/.gitignore
index 84d48914..0222b199 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,11 +23,12 @@ mdbx_stat
 /test/test
 test/test.vcxproj.user
 test/tmp.db
-test/tmp.db-lock
+test/tmp.db-lck
 tmp.db
-tmp.db-lock
+tmp.db-lck
 valgrind.*
 .vs/
 Win32/
 x64/
 x86/
+test.log
diff --git a/Makefile b/Makefile
index b9c36c74..cbe96991 100644
--- a/Makefile
+++ b/Makefile
@@ -66,7 +66,7 @@ clean:
 	rm -rf $(TOOLS) test/test @* *.[ao] *.[ls]o *~ tmp.db/* *.gcov *.log *.err
 
 check:	test/test
-	test/test --pathname=tmp.db --dont-cleanup-after basic && ./mdbx_chk -vn tmp.db
+	test/test --pathname=tmp.db --dont-cleanup-after basic | tee test.log | tail -n 42 && ./mdbx_chk -vn tmp.db
 
 mdbx.o: $(MDBX_SRC) Makefile
 	$(CC) $(CFLAGS) -c src/mdbx.c -o $@
diff --git a/appveyor.yml b/appveyor.yml
index 850e61fb..214c853d 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -23,7 +23,11 @@ build:
 test_script:
 - ps: |
     if (($env:PLATFORM -eq "x86") -and (Test-Path "C:\projects\libmdbx\Win32\$env:CONFIGURATION\test.exe" -PathType Leaf)) {
-      & "C:\projects\libmdbx\Win32\$env:CONFIGURATION\test.exe" --pathname=tmp.db --dont-cleanup-after basic
+      $test = "C:\projects\libmdbx\Win32\$env:CONFIGURATION\test.exe"
     } else {
-      & "C:\projects\libmdbx\$env:PLATFORM\$env:CONFIGURATION\test.exe" --pathname=tmp.db --dont-cleanup-after basic
+      $test = "C:\projects\libmdbx\$env:PLATFORM\$env:CONFIGURATION\test.exe"
     }
+    & "$test" --pathname=tmp.db --dont-cleanup-after basic | Tee-Object -file test.log | Select-Object -last 42
+
+artifacts:
+  - path: test.log
diff --git a/circle.yml b/circle.yml
index c10629e1..77da30e9 100644
--- a/circle.yml
+++ b/circle.yml
@@ -11,4 +11,4 @@ compile:
 
 test:
   override:
-    - make check
+    - make check || mv test.log ${CIRCLE_ARTIFACTS}/