diff --git a/.github/workflows/ci-reusable.yml b/.github/workflows/ci-reusable.yml
index ba898432..a74e20eb 100644
--- a/.github/workflows/ci-reusable.yml
+++ b/.github/workflows/ci-reusable.yml
@@ -63,7 +63,7 @@ jobs:
           npm install
 
       - name: Run Ethereum node with Codex contracts
-        if: matrix.tests == 'contract' || matrix.tests == 'tools' || matrix.tests == 'all'
+        if: matrix.tests == 'contract' || matrix.tests == 'integration' || matrix.tests == 'tools' || matrix.tests == 'all'
         working-directory: vendor/codex-contracts-eth
         env:
           MSYS2_PATH_TYPE: inherit
@@ -82,6 +82,10 @@ jobs:
         if: matrix.tests == 'integration' || matrix.tests == 'all'
         env:
           CODEX_INTEGRATION_TEST_INCLUDES: ${{ matrix.includes }}
+        run: make -j${ncpu} ENABLE_PARALLEL_TESTS=0 testIntegration
+
+      - name: Parallel integration tests
+        if: matrix.tests == 'integration-parallel'
         run: make -j${ncpu} DEBUG_CODEXNODES=1 DEBUG_TESTHARNESS=1 DEBUG_UPDATES=1 testIntegration
 
       - name: Upload integration tests log files
diff --git a/Makefile b/Makefile
index d1e2ac16..5cdea524 100644
--- a/Makefile
+++ b/Makefile
@@ -156,6 +156,9 @@ endif
 ifdef TEST_TIMEOUT
   TEST_PARAMS := $(TEST_PARAMS) -d:TestTimeout=$(TEST_TIMEOUT)
 endif
+ifdef ENABLE_PARALLEL_TESTS
+  TEST_PARAMS := $(TEST_PARAMS) -d:EnableParallelTests=$(ENABLE_PARALLEL_TESTS)
+endif
 
 # Builds and runs the integration tests
 testIntegration: | build deps
diff --git a/build.nims b/build.nims
index 38ac11d1..e2581ceb 100644
--- a/build.nims
+++ b/build.nims
@@ -55,6 +55,7 @@ task testIntegration, "Run integration tests":
   for i in 2 ..< paramCount():
     if "DebugTestHarness" in paramStr(i) and truthy paramStr(i).split('=')[1]:
       testParams = "-d:chronicles_log_level=TRACE -d:chronicles_sinks=textlines[stdout]"
+      break
   test "testIntegration", params = testParams
   # use params to enable logging from the integration test executable
   # test "testIntegration", params = "-d:chronicles_sinks=textlines[notimestamps,stdout],textlines[dynamic] " &
diff --git a/tests/testIntegration.nim b/tests/testIntegration.nim
index 90eb463c..108ec7f5 100644
--- a/tests/testIntegration.nim
+++ b/tests/testIntegration.nim
@@ -37,6 +37,8 @@ const ShowContinuousStatusUpdates {.booldefine.} = false
 # Timeout duration (in mimutes) for EACH integration test file.
 const TestTimeout {.intdefine.} = 60
 
+const EnableParallelTests {.booldefine.} = true
+
 proc run() {.async.} =
   when DebugTestHarness and enabledLogLevel != LogLevel.TRACE:
     styledEcho bgWhite,
@@ -81,4 +83,17 @@ proc run() {.async.} =
   if not wasSuccessful:
     quit(1) # indicate with a non-zero exit code that the tests failed
 
-waitFor run()
+when EnableParallelTests:
+  waitFor run()
+else:
+  # run tests serially
+  import ./integration/testcli
+  import ./integration/testrestapi
+  import ./integration/testupdownload
+  import ./integration/testsales
+  import ./integration/testpurchasing
+  import ./integration/testblockexpiration
+  import ./integration/testmarketplace
+  import ./integration/testproofs
+  import ./integration/testvalidator
+  import ./integration/testecbug