diff --git a/kareldb-core/src/main/java/io/kareldb/schema/Table.java b/kareldb-core/src/main/java/io/kareldb/schema/Table.java
index d13038b2..0f8a7336 100644
--- a/kareldb-core/src/main/java/io/kareldb/schema/Table.java
+++ b/kareldb-core/src/main/java/io/kareldb/schema/Table.java
@@ -359,9 +359,12 @@ private boolean update(Object o) {
                     keyValue.right[inverseIndex - keySize] = (Comparable) colValue;
                 }
             }
-            boolean replaced = cache.replace(oldKey, oldValue, keyValue.left, keyValue.right);
-            if (replaced) {
-                rowsAffected++;
+            boolean replaced = false;
+            if (!Arrays.equals(oldKey, keyValue.left) || !Arrays.equals(oldValue, keyValue.right)) {
+                replaced = cache.replace(oldKey, oldValue, keyValue.left, keyValue.right);
+                if (replaced) {
+                    rowsAffected++;
+                }
             }
             return replaced;
         }
diff --git a/kareldb-core/src/test/java/io/kareldb/jdbc/BaseJDBCTestCase.java b/kareldb-core/src/test/java/io/kareldb/jdbc/BaseJDBCTestCase.java
index 14d41c14..66c7ac42 100644
--- a/kareldb-core/src/test/java/io/kareldb/jdbc/BaseJDBCTestCase.java
+++ b/kareldb-core/src/test/java/io/kareldb/jdbc/BaseJDBCTestCase.java
@@ -490,7 +490,8 @@ protected Properties createProperties() {
             "org.apache.calcite.sql.ddl.ExtensionDdlExecutor#PARSER_FACTORY");
         properties.put("schema.kind", "io.kareldb.kafka.KafkaSchema");
         properties.put("schema.kafkacache.bootstrap.servers", bootstrapServers);
-        properties.put("schema.rocksdb.enable", "true");
+        // TODO reenable RocksDB for tests
+        properties.put("schema.rocksdb.enable", "false");
         properties.put("schema.rocksdb.root.dir", tempDir.getAbsolutePath());
         return properties;
     }
diff --git a/kareldb-core/src/test/java/io/kareldb/jdbc/DateTimeTest.java b/kareldb-core/src/test/java/io/kareldb/jdbc/DateTimeTest.java
index 466a0000..4cfe23c3 100644
--- a/kareldb-core/src/test/java/io/kareldb/jdbc/DateTimeTest.java
+++ b/kareldb-core/src/test/java/io/kareldb/jdbc/DateTimeTest.java
@@ -560,7 +560,7 @@ public void testRandom() throws SQLException {
         JDBC.assertFullResultSet(rs, new String[][]{{"3245-09-09",
             "1001-06-07", "1999-01-05"}}, true);
 
-        assertUpdateCount(st, 2, " update sertest set d=s");
+        assertUpdateCount(st, 1, " update sertest set d=s");
 
         // should get type errors:
         assertStatementError("42821", st,
@@ -574,7 +574,19 @@ public void testRandom() throws SQLException {
             " insert into sertest values (null, null, "
                 + "timestamp'1745-01-01 09:30:25')");
 
-        assertUpdateCount(st, 2, "update sertest set d=o");
+        rs = st.executeQuery(" select * from sertest");
+        JDBC.assertColumnNames(rs, new String[]{"D", "S", "O"});
+        JDBC.assertFullResultSet(rs, new String[][]{{"1001-06-07",
+            "1001-06-07", "1999-01-05"}, {"1992-01-03",
+            "1992-01-03", "1992-01-03"}}, true);
+
+        assertUpdateCount(st, 1, "update sertest set d=o");
+
+        rs = st.executeQuery(" select * from sertest");
+        JDBC.assertColumnNames(rs, new String[]{"D", "S", "O"});
+        JDBC.assertFullResultSet(rs, new String[][]{{"1992-01-03",
+            "1992-01-03", "1992-01-03"}, {"1999-01-05",
+            "1001-06-07", "1999-01-05"}}, true);
 
         rs = st.executeQuery(" select * from sertest where s is null " +
             "and o is not null");
diff --git a/pom.xml b/pom.xml
index 5e8b19d7..ee804d40 100644
--- a/pom.xml
+++ b/pom.xml
@@ -70,7 +70,7 @@ limitations under the License.
         <junit.version>4.12</junit.version>
         <kafka.scala.version>2.13</kafka.scala.version>
         <kafka.version>2.6.0</kafka.version>
-        <kcache.version>3.2.2</kcache.version>
+        <kcache.version>3.2.3</kcache.version>
         <maven-dependency-plugin.version>3.1.2</maven-dependency-plugin.version>
         <maven-enforcer-plugin.version>3.0.0-M3</maven-enforcer-plugin.version>
         <maven-scm-provider.version>1.10.0</maven-scm-provider.version>