diff --git a/build/integration/features/bootstrap/CommandLine.php b/build/integration/features/bootstrap/CommandLine.php
index 060e2b5be269edf09229ea0d114fe76126dbbe41..b34005fdadf0d9a2796e0a4278034e176ec03a92 100644
--- a/build/integration/features/bootstrap/CommandLine.php
+++ b/build/integration/features/bootstrap/CommandLine.php
@@ -23,6 +23,8 @@
  *
  */
 
+use PHPUnit\Framework\Assert;
+
 require __DIR__ . '/../../vendor/autoload.php';
 
 trait CommandLine {
@@ -95,25 +97,6 @@ trait CommandLine {
 		return $exceptions;
 	}
 
-	/**
-	 * Finds all lines containing the given text
-	 *
-	 * @param string $input stdout or stderr output
-	 * @param string $text text to search for
-	 * @return array array of lines that matched
-	 */
-	public function findLines($input, $text) {
-		$results = [];
-		// the exception text usually appears after an "[Exception"] row
-		foreach (explode("\n", $input) as $line) {
-			if (strpos($line, $text) >= 0) {
-				$results[] = $line;
-			}
-		}
-
-		return $results;
-	}
-
 	/**
 	 * @Then /^the command was successful$/
 	 */
@@ -158,19 +141,13 @@ trait CommandLine {
 	 * @Then /^the command output contains the text "([^"]*)"$/
 	 */
 	public function theCommandOutputContainsTheText($text) {
-		$lines = $this->findLines($this->lastStdOut, $text);
-		if (empty($lines)) {
-			throw new \Exception('The command did not output the expected text on stdout "' . $exceptionText . '"');
-		}
+		Assert::assertContains($text, $this->lastStdOut, 'The command did not output the expected text on stdout');
 	}
 
 	/**
 	 * @Then /^the command error output contains the text "([^"]*)"$/
 	 */
 	public function theCommandErrorOutputContainsTheText($text) {
-		$lines = $this->findLines($this->lastStdErr, $text);
-		if (empty($lines)) {
-			throw new \Exception('The command did not output the expected text on stderr "' . $exceptionText . '"');
-		}
+		Assert::assertContains($text, $this->lastStdErr, 'The command did not output the expected text on stderr');
 	}
 }
diff --git a/build/integration/features/transfer-ownership.feature b/build/integration/features/transfer-ownership.feature
index d8dd4d5c09d47e5d7e70035224be37fdcda863fe..b18453cf3ec6b704daf2acdd9636860b53ac7558 100644
--- a/build/integration/features/transfer-ownership.feature
+++ b/build/integration/features/transfer-ownership.feature
@@ -297,13 +297,13 @@ Feature: transfer-ownership
 	Scenario: transferring ownership fails with invalid source user
 		Given user "user0" exists
 		When transferring ownership from "invalid_user" to "user0"
-		Then the command error output contains the text "Unknown source user"
+		Then the command output contains the text "Unknown source user"
 		And the command failed with exit code 1
 
 	Scenario: transferring ownership fails with invalid target user
 		Given user "user0" exists
 		When transferring ownership from "user0" to "invalid_user"
-		Then the command error output contains the text "Unknown target user"
+		Then the command output contains the text "Unknown destination user invalid_user"
 		And the command failed with exit code 1
 
 	Scenario: transferring ownership of a file
@@ -511,7 +511,7 @@ Feature: transfer-ownership
 		And user "user2" accepts last share
 		When transferring ownership of path "test" from "user0" to "user1"
 		Then the command failed with exit code 1
-		And the command error output contains the text "Could not transfer files."
+		And the command output contains the text "Could not transfer files."
 
 	Scenario: transferring ownership does not transfer received shares
 		Given user "user0" exists
@@ -547,19 +547,19 @@ Feature: transfer-ownership
 		Given user "user0" exists
 		And User "user0" created a folder "/sub"
 		When transferring ownership of path "sub" from "invalid_user" to "user0"
-		Then the command error output contains the text "Unknown source user"
+		Then the command output contains the text "Unknown source user"
 		And the command failed with exit code 1
 
 	Scenario: transferring ownership fails with invalid target user
 		Given user "user0" exists
 		And User "user0" created a folder "/sub"
 		When transferring ownership of path "sub" from "user0" to "invalid_user"
-		Then the command error output contains the text "Unknown target user"
+		Then the command output contains the text "Unknown destination user invalid_user"
 		And the command failed with exit code 1
 
 	Scenario: transferring ownership fails with invalid path
 		Given user "user0" exists
 		And user "user1" exists
 		When transferring ownership of path "test" from "user0" to "user1"
-		Then the command error output contains the text "Unknown target user"
+		Then the command output contains the text "Unknown path provided: test"
 		And the command failed with exit code 1