diff --git a/ssl_provider_keys.t b/ssl_provider_keys.t
new file mode 100644
index 00000000..d9a478bd
--- /dev/null
+++ b/ssl_provider_keys.t
@@ -0,0 +1,181 @@
+#!/usr/bin/perl
+
+# (C) Sergey Kandaurov
+# (C) Aleksei Bavshin
+# (C) Nginx, Inc.
+
+# Tests for http ssl module, loading "store:..." keys.
+
+###############################################################################
+
+use warnings;
+use strict;
+
+use Test::More;
+
+BEGIN { use FindBin; chdir($FindBin::Bin); }
+
+use lib 'lib';
+use Test::Nginx;
+
+###############################################################################
+
+select STDERR; $| = 1;
+select STDOUT; $| = 1;
+
+plan(skip_all => 'win32') if $^O eq 'MSWin32';
+
+plan(skip_all => 'may not work, leaves coredump')
+	unless $ENV{TEST_NGINX_UNSAFE};
+
+my $t = Test::Nginx->new()->has(qw/http proxy http_ssl/)->has_daemon('openssl')
+	->has_daemon('softhsm2-util')->has_daemon('pkcs11-tool');
+
+plan(skip_all => "not yet") unless $t->has_version('1.27.4');
+plan(skip_all => 'no providers') unless $t->has_feature('openssl:3');
+
+$t->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+env SOFTHSM2_CONF;
+env OPENSSL_CONF;
+
+http {
+    %%TEST_GLOBALS_HTTP%%
+
+    server {
+        listen       127.0.0.1:8081 ssl;
+        listen       127.0.0.1:8080;
+        server_name  localhost;
+
+        ssl_certificate localhost.crt;
+        ssl_certificate_key "store:pkcs11:token=NginxZero;object=nx_key_0";
+
+        location / {
+            # index index.html by default
+        }
+
+        location /proxy {
+            proxy_pass https://127.0.0.1:8081/;
+        }
+
+        location /var {
+            proxy_pass https://127.0.0.1:8082/;
+            proxy_ssl_name localhost;
+            proxy_ssl_server_name on;
+        }
+    }
+
+    server {
+        listen       127.0.0.1:8082 ssl;
+        server_name  localhost;
+
+        ssl_certificate $ssl_server_name.crt;
+        ssl_certificate_key "store:pkcs11:token=NginxZero;object=nx_key_0";
+
+        location / {
+            # index index.html by default
+        }
+    }
+}
+
+EOF
+
+# Create a SoftHSM token with a secret key, and configure OpenSSL
+# to access it using the pkcs11 provider.
+#
+# Note that library paths vary on different systems,
+# and may need to be adjusted.
+
+my $libsofthsm2_path;
+my @so_paths = (
+	'/usr/lib/softhsm',		# Debian-based
+	'/usr/local/lib/softhsm',	# FreeBSD
+	'/opt/local/lib/softhsm',	# MacPorts
+	'/lib64',			# RHEL-based
+	split /:/, $ENV{TEST_NGINX_SOFTHSM} || ''
+);
+
+for my $so_path (@so_paths) {
+	$so_path .= '/libsofthsm2.so';
+	if (-e $so_path) {
+		$libsofthsm2_path = $so_path;
+		last;
+	}
+};
+
+plan(skip_all => "libsofthsm2.so not found") unless $libsofthsm2_path;
+
+my $d = $t->testdir();
+
+$t->write_file('openssl.conf', <<EOF);
+openssl_conf = openssl_def
+
+[openssl_def]
+providers = provider_sect
+
+[provider_sect]
+default = default_sect
+pkcs11 = pkcs11_sect
+
+[default_sect]
+activate = 1
+
+[pkcs11_sect]
+pkcs11-module-path = $libsofthsm2_path
+pkcs11-module-token-pin = file:$d/pin.txt
+# https://github.com/latchset/pkcs11-provider/commit/ab6370fd
+pkcs11-module-quirks = no-deinit no-operation-state
+activate = 1
+
+[ req ]
+default_bits = 2048
+encrypt_key = no
+distinguished_name = req_distinguished_name
+[ req_distinguished_name ]
+EOF
+
+$t->write_file('pin.txt', '1234');
+
+$t->write_file('softhsm2.conf', <<EOF);
+directories.tokendir = $d/tokens/
+objectstore.backend = file
+EOF
+
+mkdir($d . '/tokens');
+
+$ENV{SOFTHSM2_CONF} = "$d/softhsm2.conf";
+$ENV{OPENSSL_CONF} = "$d/openssl.conf";
+
+foreach my $name ('localhost') {
+	system('softhsm2-util --init-token --slot 0 --label NginxZero '
+		. '--pin 1234 --so-pin 1234 '
+		. ">>$d/openssl.out 2>&1");
+
+	system("pkcs11-tool --module=$libsofthsm2_path "
+		. '-p 1234 -l -k -d 0 -a nx_key_0 --key-type rsa:2048 '
+		. ">>$d/openssl.out 2>&1");
+
+	system('openssl req -x509 -new '
+		. "-subj /CN=$name/ -out $d/$name.crt -text "
+		. "-key 'pkcs11:token=NginxZero;object=nx_key_0' "
+		. ">>$d/openssl.out 2>&1") == 0
+		or plan(skip_all => "missing provider");
+}
+
+$t->run()->plan(2);
+
+$t->write_file('index.html', '');
+
+###############################################################################
+
+like(http_get('/proxy'), qr/200 OK/, 'ssl provider keys');
+like(http_get('/var'), qr/200 OK/, 'ssl_certificate with variable');
+
+###############################################################################