diff --git a/test/run_tests.c b/test/run_tests.c
index ec91dac..d1c3152 100644
--- a/test/run_tests.c
+++ b/test/run_tests.c
@@ -28,7 +28,8 @@
 BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
-IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ==============================================================================*/
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ ==============================================================================*/
 //  Created by Laurence Lundblade on 9/30/18.
 
 
@@ -158,7 +159,7 @@
 };
 
 
-int run_tests(outputstring output, void *poutCtx, int *pNumTestsRun)
+int run_tests(const char *szTestName, outputstring output, void *poutCtx, int *pNumTestsRun)
 {
     int nTestsFailed = 0;
     int nTestsRun = 0;
@@ -168,6 +169,9 @@
     const test_entry2 *s_tests2_end = s_tests2 + sizeof(s_tests2)/sizeof(test_entry2);
     
     for(t2 = s_tests2; t2 < s_tests2_end; t2++) {
+        if(szTestName && strcmp(szTestName, t2->szTestName)) {
+            continue;
+        }
         const char * x = (t2->test_fun)();
         nTestsRun++;
         if(output) {
@@ -193,6 +197,9 @@
     const test_entry *s_tests_end = s_tests + sizeof(s_tests)/sizeof(test_entry);
     
     for(t = s_tests; t < s_tests_end; t++) {
+        if(szTestName && strcmp(szTestName, t->szTestName)) {
+            continue;
+        }
         int x = (t->test_fun)();
         nTestsRun++;
         if(output) {
diff --git a/test/run_tests.h b/test/run_tests.h
index 6c33e06..3170a33 100644
--- a/test/run_tests.h
+++ b/test/run_tests.h
@@ -33,4 +33,4 @@
 //  Created by Laurence Lundblade on 9/30/18.
 typedef int (*outputstring)(const char *szString, void *ctx);
 
-int run_tests(outputstring output, void *poutCtx, int *pNumTestsRun);
+int run_tests(const char *szTestName, outputstring output, void *poutCtx, int *pNumTestsRun);