diff --git a/src/test/ssl/t/SSL/Backend/OpenSSL.pm b/src/test/ssl/t/SSL/Backend/OpenSSL.pm
index aed6005b432..b8f169410d2 100644
--- a/src/test/ssl/t/SSL/Backend/OpenSSL.pm
+++ b/src/test/ssl/t/SSL/Backend/OpenSSL.pm
@@ -26,6 +26,7 @@ package SSL::Backend::OpenSSL;
 
 use strict;
 use warnings;
+use PostgreSQL::Test::Utils;
 use File::Basename;
 use File::Copy;
 
@@ -204,6 +205,25 @@ sub get_library
 	return $self->{_library};
 }
 
+=pod
+
+=item $backend->library_is_libressl()
+
+Detect whether the SSL library is LibreSSL.
+
+=cut
+
+sub library_is_libressl
+{
+	my ($self) = @_;
+
+	# The HAVE_SSL_CTX_SET_CERT_CB macro isn't defined for LibreSSL.
+	# (Nor for OpenSSL 1.0.1, but that's old enough that accommodating it
+	# isn't worth the cost.)
+	# We may eventually need a less-bogus heuristic.
+	return not check_pg_config("#define HAVE_SSL_CTX_SET_CERT_CB 1");
+}
+
 # Internal method for copying a set of files, taking into account wildcards
 sub _copy_files
 {
diff --git a/src/test/ssl/t/SSL/Server.pm b/src/test/ssl/t/SSL/Server.pm
index e3f8cbb451f..c7c894e209c 100644
--- a/src/test/ssl/t/SSL/Server.pm
+++ b/src/test/ssl/t/SSL/Server.pm
@@ -243,6 +243,23 @@ sub ssl_library
 
 =pod
 
+=item $server->is_libressl()
+
+Detect whether the currently used SSL backend is LibreSSL.
+(Ideally we'd not need this hack, but presently we do.)
+
+=cut
+
+sub is_libressl
+{
+	my $self = shift;
+	my $backend = $self->{backend};
+
+	return $backend->library_is_libressl();
+}
+
+=pod
+
 =item switch_server_cert(params)
 
 Change the configuration to use the given set of certificate, key, ca and