diff --git a/src/GitRepository.php b/src/GitRepository.php
index 38a7584..f8ec97b 100644
--- a/src/GitRepository.php
+++ b/src/GitRepository.php
@@ -351,7 +351,7 @@ public function commit($message, $params = NULL)
 		 */
 		public function getLastCommitId()
 		{
-			$result = $this->run('log', '--pretty=format:"%H"', '-n', '1');
+			$result = $this->run('log', '--pretty=format:%H', '-n', '1');
 			$lastLine = $result->getOutputLastLine();
 			return new CommitId((string) $lastLine);
 		}
@@ -377,23 +377,23 @@ public function getCommit($commitId)
 			}
 
 			// subject
-			$result = $this->run('log', '-1', $commitId, '--format="%s"');
+			$result = $this->run('log', '-1', $commitId, '--format=%s');
 			$subject = rtrim($result->getOutputAsString());
 
 			// body
-			$result = $this->run('log', '-1', $commitId, '--format="%b"');
+			$result = $this->run('log', '-1', $commitId, '--format=%b');
 			$body = rtrim($result->getOutputAsString());
 
 			// author email
-			$result = $this->run('log', '-1', $commitId, '--format="%ae"');
+			$result = $this->run('log', '-1', $commitId, '--format=%ae');
 			$authorEmail = rtrim($result->getOutputAsString());
 
 			// author name
-			$result = $this->run('log', '-1', $commitId, '--format="%an"');
+			$result = $this->run('log', '-1', $commitId, '--format=%an');
 			$authorName = rtrim($result->getOutputAsString());
 
 			// author date
-			$result = $this->run('log', '-1', $commitId, '--pretty="format:%ad"', '--date=iso-strict');
+			$result = $this->run('log', '-1', $commitId, '--pretty=format:%ad', '--date=iso-strict');
 			$authorDate = \DateTimeImmutable::createFromFormat(\DateTime::ATOM, (string) $result->getOutputLastLine());
 
 			if (!($authorDate instanceof \DateTimeImmutable)) {
@@ -401,15 +401,15 @@ public function getCommit($commitId)
 			}
 
 			// committer email
-			$result = $this->run('log', '-1', $commitId, '--format="%ce"');
+			$result = $this->run('log', '-1', $commitId, '--format=%ce');
 			$committerEmail = rtrim($result->getOutputAsString());
 
 			// committer name
-			$result = $this->run('log', '-1', $commitId, '--format="%cn"');
+			$result = $this->run('log', '-1', $commitId, '--format=%cn');
 			$committerName = rtrim($result->getOutputAsString());
 
 			// committer date
-			$result = $this->run('log', '-1', $commitId, '--pretty="format:%cd"', '--date=iso-strict');
+			$result = $this->run('log', '-1', $commitId, '--pretty=format:%cd', '--date=iso-strict');
 			$committerDate = \DateTimeImmutable::createFromFormat(\DateTime::ATOM, (string) $result->getOutputLastLine());
 
 			if (!($committerDate instanceof \DateTimeImmutable)) {
diff --git a/tests/GitPhp/GitRepository.getCommit.phpt b/tests/GitPhp/GitRepository.getCommit.phpt
index d3ae111..39b4f9e 100644
--- a/tests/GitPhp/GitRepository.getCommit.phpt
+++ b/tests/GitPhp/GitRepository.getCommit.phpt
@@ -12,63 +12,63 @@ test(function () {
 
 	// last commit ID
 	$runner->assert(
-		['log', '--pretty=format:"%H"', '-n', '1'],
+		['log', '--pretty=format:%H', '-n', '1'],
 		[],
 		['734713bc047d87bf7eac9674765ae793478c50d3']
 	);
 
 	// commit subject
 	$runner->assert(
-		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format="%s"'],
+		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format=%s'],
 		[],
 		['init commit', '', '']
 	);
 
 	// commit body
 	$runner->assert(
-		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format="%b"'],
+		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format=%b'],
 		[],
 		['', '', ''] // 3 empty lines
 	);
 
 	// author email
 	$runner->assert(
-		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format="%ae"'],
+		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format=%ae'],
 		[],
 		['john@example.com']
 	);
 
 	// author name
 	$runner->assert(
-		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format="%an"'],
+		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format=%an'],
 		[],
 		['John Example']
 	);
 
 	// author date
 	$runner->assert(
-		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--pretty="format:%ad"', '--date=iso-strict'],
+		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--pretty=format:%ad', '--date=iso-strict'],
 		[],
 		["2021-04-29T15:55:09+00:00"]
 	);
 
 	// committer email
 	$runner->assert(
-		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format="%ce"'],
+		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format=%ce'],
 		[],
 		["john@committer.com"]
 	);
 
 	// committer name
 	$runner->assert(
-		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format="%cn"'],
+		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format=%cn'],
 		[],
 		["John Committer"]
 	);
 
 	// committter date
 	$runner->assert(
-		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--pretty="format:%cd"', '--date=iso-strict'],
+		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--pretty=format:%cd', '--date=iso-strict'],
 		[],
 		['2021-04-29T17:55:09+02:00']
 	);
@@ -98,56 +98,56 @@ test(function () {
 
 	// commit subject
 	$runner->assert(
-		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format="%s"'],
+		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format=%s'],
 		[],
 		['init commit', '', '']
 	);
 
 	// commit body
 	$runner->assert(
-		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format="%b"'],
+		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format=%b'],
 		[],
 		['first line', 'second line', '', ''] // + 2 empty lines
 	);
 
 	// author email
 	$runner->assert(
-		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format="%ae"'],
+		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format=%ae'],
 		[],
 		['john@example.com']
 	);
 
 	// author name
 	$runner->assert(
-		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format="%an"'],
+		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format=%an'],
 		[],
 		['John Example']
 	);
 
 	// author date
 	$runner->assert(
-		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--pretty="format:%ad"', '--date=iso-strict'],
+		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--pretty=format:%ad', '--date=iso-strict'],
 		[],
 		["2021-04-29T15:55:09+00:00"]
 	);
 
 	// committer email
 	$runner->assert(
-		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format="%ce"'],
+		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format=%ce'],
 		[],
 		["john@committer.com"]
 	);
 
 	// committer name
 	$runner->assert(
-		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format="%cn"'],
+		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--format=%cn'],
 		[],
 		["John Committer"]
 	);
 
 	// committter date
 	$runner->assert(
-		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--pretty="format:%cd"', '--date=iso-strict'],
+		['log', '-1', '734713bc047d87bf7eac9674765ae793478c50d3', '--pretty=format:%cd', '--date=iso-strict'],
 		[],
 		['2021-04-29T17:55:09+02:00']
 	);
diff --git a/tests/GitPhp/GitRepository.getLastCommitId.phpt b/tests/GitPhp/GitRepository.getLastCommitId.phpt
index 7d2d18b..908edb3 100644
--- a/tests/GitPhp/GitRepository.getLastCommitId.phpt
+++ b/tests/GitPhp/GitRepository.getLastCommitId.phpt
@@ -10,7 +10,7 @@ $runner = new AssertRunner(__DIR__);
 $git = new Git($runner);
 
 $runner->assert(
-	['log', '--pretty=format:"%H"', '-n', '1'],
+	['log', '--pretty=format:%H', '-n', '1'],
 	[],
 	['734713bc047d87bf7eac9674765ae793478c50d3']
 );