diff --git a/tests/test_kem.c b/tests/test_kem.c
index 3c6c70b70..9cf644aa9 100644
--- a/tests/test_kem.c
+++ b/tests/test_kem.c
@@ -9,6 +9,9 @@
 
 #if OQS_USE_PTHREADS
 #include <pthread.h>
+#   if OQS_USE_OPENSSL
+#include <openssl/crypto.h>
+#   endif
 #endif
 
 #ifdef OQS_ENABLE_TEST_CONSTANT_TIME
@@ -206,6 +209,9 @@ struct thread_data {
 void *test_wrapper(void *arg) {
 	struct thread_data *td = arg;
 	td->rc = kem_test_correctness(td->alg_name);
+#if defined(OQS_USE_OPENSSL) && !defined(OQS_DLOPEN_OPENSSL)
+	OPENSSL_thread_stop();
+#endif
 	return NULL;
 }
 #endif
diff --git a/tests/test_sig.c b/tests/test_sig.c
index a5246cc9d..d4ed27e45 100644
--- a/tests/test_sig.c
+++ b/tests/test_sig.c
@@ -12,6 +12,9 @@
 
 #if OQS_USE_PTHREADS
 #include <pthread.h>
+#   if OQS_USE_OPENSSL
+#include <openssl/crypto.h>
+#   endif
 #endif
 
 #ifdef OQS_ENABLE_TEST_CONSTANT_TIME
@@ -183,6 +186,9 @@ struct thread_data {
 void *test_wrapper(void *arg) {
 	struct thread_data *td = arg;
 	td->rc = sig_test_correctness(td->alg_name);
+#if defined(OQS_USE_OPENSSL) && !defined(OQS_DLOPEN_OPENSSL)
+	OPENSSL_thread_stop();
+#endif
 	return NULL;
 }
 #endif
diff --git a/tests/test_sig_stfl.c b/tests/test_sig_stfl.c
index f95e61369..ba8780213 100644
--- a/tests/test_sig_stfl.c
+++ b/tests/test_sig_stfl.c
@@ -22,7 +22,9 @@
 
 #if OQS_USE_PTHREADS_IN_TESTS
 #include <pthread.h>
-
+#   if OQS_USE_OPENSSL
+#include <openssl/crypto.h>
+#   endif
 static pthread_mutex_t *test_sk_lock = NULL;
 static pthread_mutex_t *sk_lock = NULL;
 #endif
@@ -990,6 +992,9 @@ void *test_query_key(void *arg) {
 	struct lock_test_data *td = arg;
 	printf("\n%s: Start Query Stateful Key info\n", __func__);
 	td->rc = sig_stfl_test_query_key(td->alg_name);
+#if defined(OQS_USE_OPENSSL) && !defined(OQS_DLOPEN_OPENSSL)
+	OPENSSL_thread_stop();
+#endif
 	printf("%s: End Query Stateful Key info\n\n", __func__);
 	return NULL;
 }
@@ -998,6 +1003,9 @@ void *test_sig_gen(void *arg) {
 	struct lock_test_data *td = arg;
 	printf("\n%s: Start Generate Stateful Signature\n", __func__);
 	td->rc = sig_stfl_test_sig_gen(td->alg_name);
+#if defined(OQS_USE_OPENSSL) && !defined(OQS_DLOPEN_OPENSSL)
+	OPENSSL_thread_stop();
+#endif
 	printf("%s: End Generate Stateful Signature\n\n", __func__);
 	return NULL;
 }
@@ -1006,6 +1014,9 @@ void *test_create_keys(void *arg) {
 	struct lock_test_data *td = arg;
 	printf("\n%s: Start Generate Keys\n", __func__);
 	td->rc = sig_stfl_test_secret_key_lock(td->alg_name, td->katfile);
+#if defined(OQS_USE_OPENSSL) && !defined(OQS_DLOPEN_OPENSSL)
+	OPENSSL_thread_stop();
+#endif
 	printf("%s: End Generate Stateful Keys\n\n", __func__);
 	return NULL;
 }
@@ -1013,12 +1024,18 @@ void *test_create_keys(void *arg) {
 void *test_correctness_wrapper(void *arg) {
 	struct thread_data *td = arg;
 	td->rc = sig_stfl_test_correctness(td->alg_name, td->katfile);
+#if defined(OQS_USE_OPENSSL) && !defined(OQS_DLOPEN_OPENSSL)
+	OPENSSL_thread_stop();
+#endif
 	return NULL;
 }
 
 void *test_secret_key_wrapper(void *arg) {
 	struct thread_data *td = arg;
 	td->rc = sig_stfl_test_secret_key(td->alg_name, td->katfile);
+#if defined(OQS_USE_OPENSSL) && !defined(OQS_DLOPEN_OPENSSL)
+	OPENSSL_thread_stop();
+#endif
 	return NULL;
 }
 #endif