diff --git a/.travis.yml b/.travis.yml
index 94f608ae..b00f9b5c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,21 +4,31 @@ sudo: false
 
 env:
   global:
-    - COMPOSER_ROOT_VERSION=1.4.x-dev
+    - COMPOSER_ROOT_VERSION=1.x-dev
     - CORE_RELEASE=master
 
 matrix:
   fast_finish: true
   include:
     - php: 5.6
-      env: DB=MYSQL PHPUNIT_TEST=1 PHPCS_TEST=1
+      env: DB=MYSQL PHPUNIT_TEST=1
     - php: 7.0
       env: DB=MYSQL PHPUNIT_TEST=1
     - php: 7.1
-      env: DB=MYSQL PDO=1 PHPUNIT_COVERAGE_TEST=1
+      env: DB=MYSQL PHPUNIT_TEST=1
+    - php: 7.2
+      env: DB=MYSQL PHPUNIT_COVERAGE_TEST=1 PHPCS_TEST=1
+    - php: 7.2
+      env: DB=MYSQL PHPUNIT_TEST=1 PDO=1
+    - php: 7.3
+      env: DB=MYSQL PHPUNIT_TEST=1
+    - php: 7.3
+      env: DB=PGSQL PHPUNIT_TEST=1
 
 before_script:
 # Init PHP
+  - printf "\n" | pecl install imagick
+  - composer self-update || true
   - phpenv rehash
   - phpenv config-rm xdebug.ini
   - export PATH=~/.config/composer/vendor/bin:$PATH
@@ -28,6 +38,7 @@ before_script:
   - composer validate
   - composer install --prefer-dist
   - composer require --prefer-dist --no-update silverstripe/recipe-cms:4.4.x-dev
+  - if [[ $DB == PGSQL ]]; then composer require --no-update silverstripe/postgresql:2.x-dev --prefer-dist; fi
   - composer update --prefer-dist
   - if [[ $PHPCS_TEST ]]; then composer global require squizlabs/php_codesniffer:^3 --prefer-dist --no-interaction --no-progress --no-suggest -o; fi
 
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 1d2d9665..1b07be6c 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -6,5 +6,13 @@ Requires PHPUnit ^5.7
 <phpunit bootstrap="vendor/silverstripe/framework/tests/bootstrap.php" colors="true">
 	<testsuite name="Default">
 		<directory>tests/php</directory>
-    </testsuite>
+	</testsuite>
+	<filter>
+		<whitelist addUncoveredFilesFromWhitelist="true">
+			<directory suffix=".php">src/</directory>
+			<exclude>
+				<directory suffix=".php">tests/php/</directory>
+			</exclude>
+		</whitelist>
+	</filter>
 </phpunit>
diff --git a/src/Flysystem/FlysystemAssetStore.php b/src/Flysystem/FlysystemAssetStore.php
index f3ae5cc9..fff4b8d5 100644
--- a/src/Flysystem/FlysystemAssetStore.php
+++ b/src/Flysystem/FlysystemAssetStore.php
@@ -1016,7 +1016,7 @@ private function searchForEquivalentFileID($asset)
                     [
                         ['"FileHash" like ?' => DB::get_conn()->escapeString($parsedFileID['Hash']) . '%'],
                         ['not "FileHash" like ?' => DB::get_conn()->escapeString($file->getHash())],
-                        'WasPublished' => true
+                        '"WasPublished"' => true
                     ],
                     "",
                     1