diff --git a/dlls/crypt32/tests/store.c b/dlls/crypt32/tests/store.c
index 3d487ac39ca..78b05302269 100644
--- a/dlls/crypt32/tests/store.c
+++ b/dlls/crypt32/tests/store.c
@@ -127,7 +127,7 @@ static const BYTE certWithUsage[] = { 0x30, 0x81, 0x93, 0x02, 0x01, 0x01, 0x30,
  0x05, 0x05, 0x07, 0x03, 0x03, 0x06, 0x08, 0x2b, 0x06, 0x01, 0x05, 0x05, 0x07,
  0x03, 0x02, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x01 };
 static const BYTE serialNum[] = { 1 };
-static const BYTE bigCertWithDifferentIssuer[] = { 0x30, 0x7a, 0x02, 0x01, 0x01,
+static const BYTE bigCertWithDifferentSubject[] = { 0x30, 0x7a, 0x02, 0x01, 0x01,
  0x30, 0x02, 0x06, 0x00, 0x30, 0x15, 0x31, 0x13, 0x30, 0x11, 0x06, 0x03, 0x55,
  0x04, 0x03, 0x13, 0x0a, 0x4a, 0x75, 0x61, 0x6e, 0x20, 0x4c, 0x61, 0x6e, 0x67,
  0x00, 0x30, 0x22, 0x18, 0x0f, 0x31, 0x36, 0x30, 0x31, 0x30, 0x31, 0x30, 0x31,
@@ -138,6 +138,17 @@ static const BYTE bigCertWithDifferentIssuer[] = { 0x30, 0x7a, 0x02, 0x01, 0x01,
  0x00, 0x03, 0x01, 0x00, 0xa3, 0x16, 0x30, 0x14, 0x30, 0x12, 0x06, 0x03, 0x55,
  0x1d, 0x13, 0x01, 0x01, 0xff, 0x04, 0x08, 0x30, 0x06, 0x01, 0x01, 0xff, 0x02,
  0x01, 0x01 };
+static const BYTE bigCertWithDifferentIssuer[] = { 0x30, 0x7a, 0x02, 0x01,
+ 0x01, 0x30, 0x02, 0x06, 0x00, 0x30, 0x15, 0x31, 0x13, 0x30, 0x11, 0x06, 0x03,
+ 0x55, 0x04, 0x03, 0x13, 0x0a, 0x41, 0x6c, 0x65, 0x78, 0x20, 0x4c, 0x61, 0x6e,
+ 0x67, 0x00, 0x30, 0x22, 0x18, 0x0f, 0x31, 0x36, 0x30, 0x31, 0x30, 0x31, 0x30,
+ 0x31, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x5a, 0x18, 0x0f, 0x31, 0x36, 0x30,
+ 0x31, 0x30, 0x31, 0x30, 0x31, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x5a, 0x30,
+ 0x15, 0x31, 0x13, 0x30, 0x11, 0x06, 0x03, 0x55, 0x04, 0x03, 0x13, 0x0a, 0x4a,
+ 0x75, 0x61, 0x6e, 0x20, 0x4c, 0x61, 0x6e, 0x67, 0x00, 0x30, 0x07, 0x30, 0x02,
+ 0x06, 0x00, 0x03, 0x01, 0x00, 0xa3, 0x16, 0x30, 0x14, 0x30, 0x12, 0x06, 0x03,
+ 0x55, 0x1d, 0x13, 0x01, 0x01, 0xff, 0x04, 0x08, 0x30, 0x06, 0x01, 0x01, 0xff,
+ 0x02, 0x01, 0x01 };
 
 static void testAddCert(void)
 {
@@ -224,8 +235,8 @@ static void testAddCert(void)
             CertFreeCertificateContext(context);
         }
 
-        /* Adding a cert that differs by nothing more than serial number
-         * succeeds.
+        /* Adding a cert with the same issuer name and serial number (but
+         * different subject) as an existing cert succeeds.
          */
         context = NULL;
         ret = CertAddEncodedCertificateToStore(store, X509_ASN_ENCODING,
@@ -236,6 +247,18 @@ static void testAddCert(void)
         if (context)
             CertDeleteCertificateFromStore(context);
 
+        /* Adding a cert with the same subject name and serial number (but
+         * different issuer) as an existing cert succeeds.
+         */
+        context = NULL;
+        ret = CertAddEncodedCertificateToStore(store, X509_ASN_ENCODING,
+         bigCertWithDifferentSubject, sizeof(bigCertWithDifferentSubject),
+         CERT_STORE_ADD_NEW, &context);
+        ok(ret, "CertAddEncodedCertificateToStore failed: %08lx\n",
+         GetLastError());
+        if (context)
+            CertDeleteCertificateFromStore(context);
+
         /* Adding a cert with the same issuer name and serial number (but
          * different otherwise) as an existing cert succeeds.
          */