diff --git a/compat/compat-arrow/src/commonMain/kotlin/core/EnsureRaises.kt b/compat/compat-arrow/src/commonMain/kotlin/core/EnsureRaises.kt
index 5c157c6..aa6b6d4 100644
--- a/compat/compat-arrow/src/commonMain/kotlin/core/EnsureRaises.kt
+++ b/compat/compat-arrow/src/commonMain/kotlin/core/EnsureRaises.kt
@@ -36,11 +36,11 @@ inline fun <Failure> checkRaises(expected: Failure, block: Raise<Any?>.() -> Any
 	either(block).fold(
 		ifLeft = {
 			if (it != expected)
-				throw AssertionError("Expected to fail with $expected, but failed with $it")
+				throw AssertionError("Expected to fail with $expected\nbut failed with $it")
 			// else: successful case
 		},
 		ifRight = {
-			throw AssertionError("Expected to fail with $expected, but the operation was successful and returned $it")
+			throw AssertionError("Expected to fail with $expected\nbut the operation was successful and returned $it")
 		},
 	)
 }
@@ -62,11 +62,11 @@ inline fun <reified Failure> checkRaises(block: Raise<Any?>.() -> Any?) {
 	either(block).fold(
 		ifLeft = {
 			if (it !is Failure)
-				throw AssertionError("Expected to fail with ${Failure::class}, but failed with $it")
+				throw AssertionError("Expected to fail with ${Failure::class}\nbut failed with $it")
 			// else: successful case
 		},
 		ifRight = {
-			throw AssertionError("Expected to fail with ${Failure::class}, but the operation was successful and returned $it")
+			throw AssertionError("Expected to fail with ${Failure::class}\nbut the operation was successful and returned $it")
 		},
 	)
 }
diff --git a/compat/compat-arrow/src/commonTest/kotlin/EnsureRaisesTest.kt b/compat/compat-arrow/src/commonTest/kotlin/EnsureRaisesTest.kt
index 1555eea..4780c61 100644
--- a/compat/compat-arrow/src/commonTest/kotlin/EnsureRaisesTest.kt
+++ b/compat/compat-arrow/src/commonTest/kotlin/EnsureRaisesTest.kt
@@ -37,7 +37,7 @@ val CheckRaisesTest by preparedSuite {
 				5
 			}
 		}
-		check(e.message matches "Expected to fail with .*(Any|Object).*, but the operation was successful and returned 5")
+		check(e.message matches "Expected to fail with .*(Any|Object).*\nbut the operation was successful and returned 5")
 	}
 
 	test("Throws when the wrong thing is raised") {
@@ -46,7 +46,7 @@ val CheckRaisesTest by preparedSuite {
 				raise(6)
 			}
 		}
-		check(e.message matches "Expected to fail with 5, but failed with 6")
+		check(e.message matches "Expected to fail with 5\nbut failed with 6")
 	}
 
 	test("Throws when nothing is raised") {
@@ -55,7 +55,7 @@ val CheckRaisesTest by preparedSuite {
 				5
 			}
 		}
-		check(e.message matches "Expected to fail with .*(Any|Object).*, but the operation was successful and returned 5")
+		check(e.message matches "Expected to fail with .*(Any|Object).*\nbut the operation was successful and returned 5")
 	}
 
 	test("Throws when the wrong thing is raised") {
@@ -64,7 +64,7 @@ val CheckRaisesTest by preparedSuite {
 				raise(6)
 			}
 		}
-		check(e.message matches "Expected to fail with 5, but failed with 6")
+		check(e.message matches "Expected to fail with 5\nbut failed with 6")
 	}
 
 }