diff --git a/src/utils/__tests__/parse-stack-trace.test.ts b/src/utils/__tests__/parse-stack-trace.test.ts
index acf94a7..f21007c 100644
--- a/src/utils/__tests__/parse-stack-trace.test.ts
+++ b/src/utils/__tests__/parse-stack-trace.test.ts
@@ -37,7 +37,7 @@ AssertionError: 1 != 2`;
     });
   });
 
-  describe('Java stack traces', () => {
+  describe('Java/Kotlin stack traces', () => {
     it('parses at package.Class(File.java:N) format', () => {
       const trace = `java.lang.AssertionError: expected:<3> but was:<4>
 	at com.example.FooTest.testAdd(FooTest.java:42)
@@ -45,6 +45,14 @@ AssertionError: 1 != 2`;
 
       expect(parseFileLocation(trace)).toEqual({ path: 'FooTest.java', line: 42 });
     });
+
+    it('parses at package.Class(File.kt:N) format', () => {
+      const trace = `java.lang.AssertionError: expected:<3> but was:<4>
+	at com.example.FooTest.testAdd(FooTest.kt:42)
+	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)`;
+
+      expect(parseFileLocation(trace)).toEqual({ path: 'FooTest.kt', line: 42 });
+    });
   });
 
   describe('Go stack traces', () => {
diff --git a/src/utils/parse-stack-trace.ts b/src/utils/parse-stack-trace.ts
index d7eb9f6..0b6378d 100644
--- a/src/utils/parse-stack-trace.ts
+++ b/src/utils/parse-stack-trace.ts
@@ -33,9 +33,9 @@ const PATTERNS: PatternExtractor[] = [
     return { path: match[1], line: Number.parseInt(match[2], 10) };
   },
 
-  // Java: at package.Class(File.java:N)
+  // Java/Kotlin: at package.Class(File.java:N) or at package.Class(File.kt:N)
   (line) => {
-    const match = line.match(/at\s+[\w.$]+\(([A-Za-z][\w]*\.java):(\d+)\)/);
+    const match = line.match(/at\s+[\w.$]+\(([A-Za-z][\w]*\.(?:java|kt)):(\d+)\)/);
     if (!match) return null;
     return { path: match[1], line: Number.parseInt(match[2], 10) };
   },