diff --git a/src/kotlinx/src/test/kotlin/integration/CustomFunctions.kt b/src/kotlinx/src/test/kotlin/integration/CustomFunctions.kt
index 96d41f3..a98e90e 100644
--- a/src/kotlinx/src/test/kotlin/integration/CustomFunctions.kt
+++ b/src/kotlinx/src/test/kotlin/integration/CustomFunctions.kt
@@ -1,9 +1,6 @@
 package solutions.bitbadger.documents.kotlinx.tests.integration
 
 import solutions.bitbadger.documents.*
-import solutions.bitbadger.documents.java.extensions.countAll
-import solutions.bitbadger.documents.java.extensions.insert
-import solutions.bitbadger.documents.java.extensions.writeCustomJsonArray
 import solutions.bitbadger.documents.kotlinx.Results
 import solutions.bitbadger.documents.kotlinx.extensions.*
 import solutions.bitbadger.documents.kotlinx.tests.ArrayDocument
@@ -46,7 +43,7 @@ object CustomFunctions {
     fun jsonArraySingle(db: ThrowawayDatabase) {
         db.conn.insert(TEST_TABLE, ArrayDocument("one", listOf("2", "3")))
         assertEquals(
-            JsonFunctions.maybeJsonB("[{\"id\":\"one\",\"values\":[\"2\",\"3\"]}]"),
+            JsonFunctions.maybeJsonB("""[{"id":"one","values":["2","3"]}]"""),
             db.conn.customJsonArray(FindQuery.all(TEST_TABLE), listOf(), Results::jsonFromData),
             "A single document list was not represented correctly"
         )
@@ -55,9 +52,8 @@ object CustomFunctions {
     fun jsonArrayMany(db: ThrowawayDatabase) {
         ArrayDocument.testDocuments.forEach { db.conn.insert(TEST_TABLE, it) }
         assertEquals(
-            JsonFunctions.maybeJsonB("[{\"id\":\"first\",\"values\":[\"a\",\"b\",\"c\"]},"
-                    + "{\"id\":\"second\",\"values\":[\"c\",\"d\",\"e\"]},"
-                    + "{\"id\":\"third\",\"values\":[\"x\",\"y\",\"z\"]}]"),
+            JsonFunctions.maybeJsonB("""[{"id":"first","values":["a","b","c"]},"""
+                    + """{"id":"second","values":["c","d","e"]},{"id":"third","values":["x","y","z"]}]"""),
             db.conn.customJsonArray(FindQuery.all(TEST_TABLE) + orderBy(listOf(Field.named("id"))), listOf(),
                 Results::jsonFromData),
             "A multiple document list was not represented correctly"
diff --git a/src/kotlinx/src/test/kotlin/integration/JsonFunctions.kt b/src/kotlinx/src/test/kotlin/integration/JsonFunctions.kt
index 9aaecf4..8ba92e9 100644
--- a/src/kotlinx/src/test/kotlin/integration/JsonFunctions.kt
+++ b/src/kotlinx/src/test/kotlin/integration/JsonFunctions.kt
@@ -121,7 +121,7 @@ object JsonFunctions {
         Configuration.idField = "key"
         try {
             db.conn.insert(TEST_TABLE, NumIdDocument(18, "howdy"))
-            checkByIdString(db.conn.jsonById(TEST_TABLE, 18))
+            checkByIdNumber(db.conn.jsonById(TEST_TABLE, 18))
         } finally {
             Configuration.idField = "id"
         }
diff --git a/src/kotlinx/src/test/kotlin/integration/PgDB.kt b/src/kotlinx/src/test/kotlin/integration/PgDB.kt
index 1256d1e..a372702 100644
--- a/src/kotlinx/src/test/kotlin/integration/PgDB.kt
+++ b/src/kotlinx/src/test/kotlin/integration/PgDB.kt
@@ -8,16 +8,11 @@ import solutions.bitbadger.documents.kotlinx.tests.TEST_TABLE
 /**
  * A wrapper for a throwaway PostgreSQL database
  */
-class PgDB : ThrowawayDatabase {
-
-    private var dbName = ""
+class PgDB : ThrowawayDatabase() {
 
     init {
-        dbName = "throwaway_${AutoId.generateRandomString(8)}"
         Configuration.connectionString = connString("postgres")
-        Configuration.dbConn().use {
-            it.customNonQuery("CREATE DATABASE $dbName")
-        }
+        Configuration.dbConn().use { it.customNonQuery("CREATE DATABASE $dbName") }
         Configuration.connectionString = connString(dbName)
     }
 
@@ -30,9 +25,7 @@ class PgDB : ThrowawayDatabase {
     override fun close() {
         conn.close()
         Configuration.connectionString = connString("postgres")
-        Configuration.dbConn().use {
-            it.customNonQuery("DROP DATABASE $dbName")
-        }
+        Configuration.dbConn().use { it.customNonQuery("DROP DATABASE $dbName") }
         Configuration.connectionString = null
     }
 
diff --git a/src/kotlinx/src/test/kotlin/integration/SQLiteDB.kt b/src/kotlinx/src/test/kotlin/integration/SQLiteDB.kt
index 8ea554d..ab69d33 100644
--- a/src/kotlinx/src/test/kotlin/integration/SQLiteDB.kt
+++ b/src/kotlinx/src/test/kotlin/integration/SQLiteDB.kt
@@ -9,12 +9,9 @@ import java.io.File
 /**
  * A wrapper for a throwaway SQLite database
  */
-class SQLiteDB : ThrowawayDatabase {
-
-    private var dbName = ""
+class SQLiteDB : ThrowawayDatabase() {
 
     init {
-        dbName = "test-db-${AutoId.generateRandomString(8)}.db"
         Configuration.connectionString = "jdbc:sqlite:$dbName"
     }
 
diff --git a/src/kotlinx/src/test/kotlin/integration/ThrowawayDatabase.kt b/src/kotlinx/src/test/kotlin/integration/ThrowawayDatabase.kt
index 858ccc5..437e7c6 100644
--- a/src/kotlinx/src/test/kotlin/integration/ThrowawayDatabase.kt
+++ b/src/kotlinx/src/test/kotlin/integration/ThrowawayDatabase.kt
@@ -1,14 +1,18 @@
 package solutions.bitbadger.documents.kotlinx.tests.integration
 
+import solutions.bitbadger.documents.AutoId
 import java.sql.Connection
 
 /**
  * Common interface for PostgreSQL and SQLite throwaway databases
  */
-interface ThrowawayDatabase : AutoCloseable {
+abstract class ThrowawayDatabase : AutoCloseable {
+
+    /** The name of the throwaway database */
+    protected val dbName = "throwaway_${AutoId.generateRandomString(8)}"
 
     /** The database connection for the throwaway database */
-    val conn: Connection
+    abstract val conn: Connection
 
     /**
      * Determine if a database object exists
@@ -16,5 +20,5 @@ interface ThrowawayDatabase : AutoCloseable {
      * @param name The name of the object whose existence should be checked
      * @return True if the object exists, false if not
      */
-    fun dbObjectExists(name: String): Boolean
+    abstract fun dbObjectExists(name: String): Boolean
 }