diff --git a/delta-coverage-gradle/src/main/kotlin/io/github/surpsg/deltacoverage/gradle/NativeGitDiffTask.kt b/delta-coverage-gradle/src/main/kotlin/io/github/surpsg/deltacoverage/gradle/NativeGitDiffTask.kt
index 769e1df3..ee978136 100644
--- a/delta-coverage-gradle/src/main/kotlin/io/github/surpsg/deltacoverage/gradle/NativeGitDiffTask.kt
+++ b/delta-coverage-gradle/src/main/kotlin/io/github/surpsg/deltacoverage/gradle/NativeGitDiffTask.kt
@@ -31,8 +31,9 @@ abstract class NativeGitDiffTask @Inject constructor(
         val file: File = diffFile.get().asFile
         file.outputStream().use { fileOutputStream ->
             project.exec {
-                it.setCommandLine("git", "diff", "--no-color", "--minimal", targetBranch.get())
+                it.setCommandLine("git", "diff", "--no-color", "--minimal", "${targetBranch.get()}...")
                 it.standardOutput = fileOutputStream
+                it.errorOutput = System.err
             }
 
             println("Diff file generated: file://${file.absolutePath}")