diff --git a/config.mak.uname b/config.mak.uname
index 7fc2c5bf8da743..3e26bb074a4b51 100644
--- a/config.mak.uname
+++ b/config.mak.uname
@@ -301,17 +301,14 @@ ifeq ($(uname_S),FreeBSD)
 	FILENO_IS_A_MACRO = UnfortunatelyYes
 endif
 ifeq ($(uname_S),OpenBSD)
-	NO_STRCASESTR = YesPlease
-	NO_MEMMEM = YesPlease
+	DIR_HAS_BSD_GROUP_SEMANTICS = YesPlease
 	USE_ST_TIMESPEC = YesPlease
 	NEEDS_LIBICONV = YesPlease
 	BASIC_CFLAGS += -I/usr/local/include
 	BASIC_LDFLAGS += -L/usr/local/lib
 	HAVE_PATHS_H = YesPlease
 	HAVE_BSD_SYSCTL = YesPlease
-	HAVE_BSD_KERN_PROC_SYSCTL = YesPlease
 	CSPRNG_METHOD = arc4random
-	PROCFS_EXECUTABLE_PATH = /proc/curproc/file
 	FREAD_READS_DIRECTORIES = UnfortunatelyYes
 	FILENO_IS_A_MACRO = UnfortunatelyYes
 endif
diff --git a/t/t5410-receive-pack.sh b/t/t5410-receive-pack.sh
index f76a22943ef0d1..09d6bfd2a10f5a 100755
--- a/t/t5410-receive-pack.sh
+++ b/t/t5410-receive-pack.sh
@@ -41,7 +41,19 @@ test_expect_success 'with core.alternateRefsPrefixes' '
 	test_cmp expect actual.haves
 '
 
-test_expect_success 'receive-pack missing objects fails connectivity check' '
+# The `tee.exe` shipped in Git for Windows v2.49.0 is known to hang frequently
+# when spawned from `git.exe` and piping its output to `git.exe`. This seems
+# related to MSYS2 runtime bug fixes regarding the signal handling; Let's just
+# skip the tests that need to exercise this when the faulty MSYS2 runtime is
+# detected; The test cases are exercised enough in other matrix jobs of the CI
+# runs.
+test_lazy_prereq TEE_DOES_NOT_HANG '
+	test_have_prereq !MINGW &&
+	case "$(uname -a)" in *3.5.7-463ebcdc.x86_64*) false;; esac
+'
+
+test_expect_success TEE_DOES_NOT_HANG \
+	'receive-pack missing objects fails connectivity check' '
 	test_when_finished rm -rf repo remote.git setup.git &&
 
 	git init repo &&
@@ -62,7 +74,8 @@ test_expect_success 'receive-pack missing objects fails connectivity check' '
 	test_must_fail git -C remote.git cat-file -e $(git -C repo rev-parse HEAD)
 '
 
-test_expect_success 'receive-pack missing objects bypasses connectivity check' '
+test_expect_success TEE_DOES_NOT_HANG \
+	'receive-pack missing objects bypasses connectivity check' '
 	test_when_finished rm -rf repo remote.git setup.git &&
 
 	git init repo &&