diff --git a/test/notes.js b/test/notes.js
index 2ff890dc..baa57ad1 100644
--- a/test/notes.js
+++ b/test/notes.js
@@ -30,7 +30,7 @@ const configList = [
       "\t* NODE_ORACLEDB_PASSWORD\n" +
       "\t* NODE_ORACLEDB_CONNECTIONSTRING\n",
   }
-]
+];
 
 if (dbconfig.test.DBA_PRIVILEGE) {
   configList.push({
@@ -86,7 +86,7 @@ before(function(done) {
       conn.execute(
         "select * from dual",
         function(err, result) {
-          if (!Boolean(err) && Boolean(result.rows) && (result.rows[0][0]==="X")) {
+          if (!err && result.rows && (result.rows[0][0]==="X")) {
             cb(null, index);
           } else {
             cb(new Error("Query test failed"), index);
@@ -95,7 +95,7 @@ before(function(done) {
       );
     });
     seriesList.push(function (cb) {
-      conn.close(function (err) {cb(err, index)});
+      conn.close(function (err) {cb(err, index);});
     });
   });
   async.series(seriesList, function(err, results) {
diff --git a/test/soda5.js b/test/soda5.js
index 617ba5f5..10cc77e4 100644
--- a/test/soda5.js
+++ b/test/soda5.js
@@ -487,7 +487,7 @@ describe('173. soda5.js', () => {
     await dropIdxOpt(options);
   }); // 173.11
 
-  it('173.12 getDataGiuide(), basic case', async () => {
+  it('173.12 getDataGuide(), basic case', async () => {
   
     let conn, collection;
 
@@ -512,54 +512,50 @@ describe('173. soda5.js', () => {
       should.not.exist(err);
     }
 
-    let compatibleVersion;
-    if (dbconfig.test.DBA_PRIVILEGE) {
-      try {
-        const connectionDetails = {
-          user          : dbconfig.test.DBA_user,
-          password      : dbconfig.test.DBA_password,
-          connectString : dbconfig.connectString,
-          privilege     : oracledb.SYSDBA,
-        };
-        let conn = await oracledb.getConnection(connectionDetails);
-        let res = await conn.execute("select name, value from v$parameter where name like lower('%'||:x||'%')", ['COMPATIBLE']);
-        if(res.rows.length > 0) {
-          compatibleVersion = res.rows[0][1];
-        }
-        await conn.close();
-      } catch (err) {
-        should.not.exist(err);
-      }
-    }
-    const isCreateIndexEnabled = sodaUtil.versionStringCompare(compatibleVersion, '12.2.0.0.0');
+    /*
+     * if isCreateIndexEligible >= 0: Can Create Index without error
+     * if isCreateIndexEligible < 0: Create Index will throw error ORA-00406
+     * if isCreateIndexEligible = undefined: Getting COMPATIBLE VERSION string failed, the following part is skipped
+     */
+    const isCreateIndexEligible = testsUtil.versionStringCompare(await testsUtil.getDBCompatibleVersion(), '12.2.0.0.0');
     try {
       let indexSpec = {
         "name": "TEST_IDX",
         "search_on": "none",
         "dataguide": "on"
       };
-      if (isCreateIndexEnabled >= 0) {
+      if (isCreateIndexEligible >= 0) {
         await collection.createIndex(indexSpec);
         let outDocument = await collection.getDataGuide();
         should.exist(outDocument);
-      } else if(isCreateIndexEnabled < 0){
+      } else if(isCreateIndexEligible < 0){
         await testsUtil.assertThrowsAsync(async () => {await collection.createIndex(indexSpec);}, /ORA-00406:/);
       }
     } catch(err) {
       should.not.exist(err);
     }
-    if (isCreateIndexEnabled >= 0) {
+
+    if (isCreateIndexEligible >= 0) {
       try {
         let result = await collection.dropIndex('TEST_IDX');
         should.strictEqual(result.dropped, true);
         await conn.commit();
-        await collection.drop();
-        await conn.close();
       } catch(err) {
         should.not.exist(err);
       }
     }
 
+    try {
+      if (collection) await collection.drop();
+    } catch (err) {
+      should.not.exist(err);
+    }
+    try {
+      if (conn) await conn.close();
+    } catch (err) {
+      should.not.exist(err);
+    }
+
   }); // 173.12
 
 });
diff --git a/test/sodaUtil.js b/test/sodaUtil.js
index 129650b5..d7db6f1b 100644
--- a/test/sodaUtil.js
+++ b/test/sodaUtil.js
@@ -79,26 +79,3 @@ sodaUtil.t_contents = [
   { id: 1006, name: "Joe",      office: "San Francisco" },
   { id: 1007, name: "Gavin",    office: "New York" }
 ];
-
-
-// Function versionStringCompare returns:
-// * 1 if version1 is greater than version2
-// * -1 if version1 is smaller than version2
-// * 0 if version1 is equal to version2
-// * undefined if eigher version1 or version2 is not string
-sodaUtil.versionStringCompare = function(version1, version2) {
-  if (typeof version1 === 'string' && typeof version2 === 'string') {
-    let tokens1 = version1.split('.');
-    let tokens2 = version2.split('.');
-    let len = Math.min(tokens1.length, tokens2.length);
-    for (let i = 0; i < len; i++) {
-      const t1 = parseInt(tokens1[i]), t2 = parseInt(tokens2[i]);
-      if (t1 > t2) return 1;
-      if (t1 < t2) return -1;
-    }
-    if (tokens1.length < tokens2.length) return 1;
-    if (tokens1.length > tokens2.length) return -1;
-    return 0;
-  }
-  return undefined;
-};
\ No newline at end of file
diff --git a/test/testsUtil.js b/test/testsUtil.js
index 23b131f0..389e13aa 100644
--- a/test/testsUtil.js
+++ b/test/testsUtil.js
@@ -30,6 +30,7 @@
 const oracledb = require('oracledb');
 const dbconfig = require('./dbconfig.js');
 const assert = require('assert');
+const should = require('should');
 
 let testsUtil = exports;
 module.exports = testsUtil;
@@ -65,3 +66,48 @@ testsUtil.generateRandomPassword = function(length=6) {
   }
   return result;
 };
+
+testsUtil.getDBCompatibleVersion = async function() {
+  let compatibleVersion;
+  if (dbconfig.test.DBA_PRIVILEGE) {
+    try {
+      const connectionDetails = {
+        user          : dbconfig.test.DBA_user,
+        password      : dbconfig.test.DBA_password,
+        connectString : dbconfig.connectString,
+        privilege     : oracledb.SYSDBA,
+      };
+      let conn = await oracledb.getConnection(connectionDetails);
+      let res = await conn.execute("select name, value from v$parameter where name = 'compatible'");
+      if(res.rows.length > 0) {
+        compatibleVersion = res.rows[0][1];
+      }
+      await conn.close();
+    } catch (err) {
+      should.not.exist(err);
+    }
+  }
+  return compatibleVersion;
+};
+
+// Function versionStringCompare returns:
+// * 1 if version1 is greater than version2
+// * -1 if version1 is smaller than version2
+// * 0 if version1 is equal to version2
+// * undefined if eigher version1 or version2 is not string
+testsUtil.versionStringCompare = function(version1, version2) {
+  if (typeof version1 === 'string' && typeof version2 === 'string') {
+    let tokens1 = version1.split('.');
+    let tokens2 = version2.split('.');
+    let len = Math.min(tokens1.length, tokens2.length);
+    for (let i = 0; i < len; i++) {
+      const t1 = parseInt(tokens1[i]), t2 = parseInt(tokens2[i]);
+      if (t1 > t2) return 1;
+      if (t1 < t2) return -1;
+    }
+    if (tokens1.length < tokens2.length) return 1;
+    if (tokens1.length > tokens2.length) return -1;
+    return 0;
+  }
+  return undefined;
+};