diff --git a/src/test/kotlin/org/springframework/data/r2dbc/repository/query/ReactiveR2dbcQueryMethodCoroutineUnitTests.kt b/src/test/kotlin/org/springframework/data/r2dbc/repository/query/ReactiveR2dbcQueryMethodCoroutineUnitTests.kt
index 9a68bc9..a62adf9 100644
--- a/src/test/kotlin/org/springframework/data/r2dbc/repository/query/ReactiveR2dbcQueryMethodCoroutineUnitTests.kt
+++ b/src/test/kotlin/org/springframework/data/r2dbc/repository/query/ReactiveR2dbcQueryMethodCoroutineUnitTests.kt
@@ -50,7 +50,7 @@ class ReactiveR2dbcQueryMethodCoroutineUnitTests {
 		val method = PersonRepository::class.java.getMethod("findAllById")
 		val queryMethod = R2dbcQueryMethod(method, DefaultRepositoryMetadata(PersonRepository::class.java), projectionFactory, R2dbcMappingContext())
 
-		assertThat(queryMethod.isCollectionQuery).isTrue
+		assertThat(queryMethod.isCollectionQuery).isTrue()
 	}
 
 	@Test // gh-384
@@ -59,7 +59,7 @@ class ReactiveR2dbcQueryMethodCoroutineUnitTests {
 		val method = PersonRepository::class.java.getMethod("findSuspendAllById", Continuation::class.java)
 		val queryMethod = R2dbcQueryMethod(method, DefaultRepositoryMetadata(PersonRepository::class.java), projectionFactory, R2dbcMappingContext())
 
-		assertThat(queryMethod.isCollectionQuery).isTrue
+		assertThat(queryMethod.isCollectionQuery).isTrue()
 	}
 
 	@Test // gh-395
@@ -68,6 +68,6 @@ class ReactiveR2dbcQueryMethodCoroutineUnitTests {
 		val method = PersonRepository::class.java.getMethod("findSuspendedAllById", Continuation::class.java)
 		val queryMethod = R2dbcQueryMethod(method, DefaultRepositoryMetadata(PersonRepository::class.java), projectionFactory, R2dbcMappingContext())
 
-		assertThat(queryMethod.isCollectionQuery).isTrue
+		assertThat(queryMethod.isCollectionQuery).isTrue()
 	}
 }