diff --git a/.github/build.sh b/.github/build.sh
index 33a56ed3..b3ecfb45 100644
--- a/.github/build.sh
+++ b/.github/build.sh
@@ -47,7 +47,7 @@ case "${CC:-gcc}" in
 			export PATH=$PATH:/Library/Developer/CommandLineTools/usr/bin
 		fi
 		llvm-profdata merge unittest.profraw -o unittest.profdata
-		llvm-profdata merge inttest.profraw -o inttest.profdata
+		llvm-profdata merge inttest.profraw* -o inttest.profdata
 		llvm-cov show -show-line-counts-or-regions -instr-profile=unittest.profdata test/unittest_bin > unittest-cmake-coverage.txt
 		llvm-cov show -show-line-counts-or-regions -instr-profile=inttest.profdata /usr/local/bin/znc > inttest-znc-coverage.txt
 		find /usr/local/lib/znc -name '*.so' -or -name '*.bundle' | while read f; do llvm-cov show -show-line-counts-or-regions -instr-profile=inttest.profdata $f > inttest-$(basename $f)-coverage.txt; done
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 780a7fb6..827cdb86 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -102,6 +102,7 @@ add_custom_target(inttest COMMAND
 	# znc-buildmod should use the correct compiler.
 	# https://bugs.gentoo.org/699258 is an example of how it can go wrong.
 	${CMAKE_COMMAND} -E env MAKEFLAGS= CXX=${CMAKE_CXX_COMPILER}
+	"INTTEST_BIN=${CMAKE_CURRENT_BINARY_DIR}/integration/inttest"
 	"${PROJECT_SOURCE_DIR}/third_party/gtest-parallel/gtest-parallel"
-	"${CMAKE_CURRENT_BINARY_DIR}/integration/inttest")
+	"${CMAKE_CURRENT_SOURCE_DIR}/integration/wrapper.py")
 add_dependencies(inttest inttest_bin)
diff --git a/test/integration/tests/scripting.cpp b/test/integration/tests/scripting.cpp
index 211c631d..86c3f950 100644
--- a/test/integration/tests/scripting.cpp
+++ b/test/integration/tests/scripting.cpp
@@ -159,6 +159,9 @@ TEST_F(ZNCTest, ModperlSocket) {
 TEST_F(ZNCTest, ModpythonUnixSocket) {
 #ifndef WANT_PYTHON
     GTEST_SKIP() << "Modpython is disabled";
+#endif
+#ifdef __CYGWIN__
+    GTEST_SKIP() << "Bug to fix: https://github.com/znc/znc/issues/1947";
 #endif
     auto znc = Run();
     znc->CanLeak();
@@ -207,6 +210,9 @@ TEST_F(ZNCTest, ModpythonUnixSocket) {
 TEST_F(ZNCTest, ModperlUnixSocket) {
 #ifndef WANT_PERL
     GTEST_SKIP() << "Modperl is disabled";
+#endif
+#ifdef __CYGWIN__
+    GTEST_SKIP() << "Bug to fix: https://github.com/znc/znc/issues/1947";
 #endif
     auto znc = Run();
     znc->CanLeak();
diff --git a/test/integration/wrapper.py b/test/integration/wrapper.py
new file mode 100755
index 00000000..efa707a9
--- /dev/null
+++ b/test/integration/wrapper.py
@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2004-2025 ZNC, see the NOTICE file for details.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# The purpose of this file is to fix LLVM profiler data in the parallel
+# execution of the test - all of them write to the same file, so it races and
+# produces invalid data
+
+import os
+import sys
+import re
+
+test = ''
+for arg in sys.argv:
+    m = re.match(r'--gtest_filter=(.*)',  arg)
+    if m:
+        test = m[1]
+        break
+
+if test != '' and 'LLVM_PROFILE_FILE' in os.environ:
+    os.environ['LLVM_PROFILE_FILE'] += '.' + test
+
+binary = os.environ['INTTEST_BIN']
+sys.argv[0] = binary
+
+os.execv(binary, sys.argv)