1 files changed, 15 insertions, 3 deletions

diff --git a/src/test/dbwrapper_tests.cpp b/src/test/dbwrapper_tests.cpp
index 6ed6e7744e..efddafe17e 100644
--- a/src/test/dbwrapper_tests.cpp
+++ b/src/test/dbwrapper_tests.cpp
@@ -204,19 +204,31 @@ BOOST_AUTO_TEST_CASE(iterator_ordering)
     for (int x=0x00; x<256; ++x) {
         uint8_t key = x;
         uint32_t value = x*x;
-        BOOST_CHECK(dbw.Write(key, value));
+        if (!(x & 1)) BOOST_CHECK(dbw.Write(key, value));
     }
 
+    // Check that creating an iterator creates a snapshot
     std::unique_ptr<CDBIterator> it(const_cast<CDBWrapper&>(dbw).NewIterator());
+
+    for (int x=0x00; x<256; ++x) {
+        uint8_t key = x;
+        uint32_t value = x*x;
+        if (x & 1) BOOST_CHECK(dbw.Write(key, value));
+    }
+
     for (int seek_start : {0x00, 0x80}) {
         it->Seek((uint8_t)seek_start);
-        for (int x=seek_start; x<256; ++x) {
+        for (int x=seek_start; x<255; ++x) {
             uint8_t key;
             uint32_t value;
             BOOST_CHECK(it->Valid());
             if (!it->Valid()) // Avoid spurious errors about invalid iterator's key and value in case of failure
                 break;
             BOOST_CHECK(it->GetKey(key));
+            if (x & 1) {
+                BOOST_CHECK_EQUAL(key, x + 1);
+                continue;
+            }
             BOOST_CHECK(it->GetValue(value));
             BOOST_CHECK_EQUAL(key, x);
             BOOST_CHECK_EQUAL(value, x*x);
@@ -231,7 +243,7 @@ struct StringContentsSerializer {
     // This is a terrible idea
     std::string str;
     StringContentsSerializer() {}
-    StringContentsSerializer(const std::string& inp) : str(inp) {}
+    explicit StringContentsSerializer(const std::string& inp) : str(inp) {}
 
     StringContentsSerializer& operator+=(const std::string& s) {
         str += s;