diff --git a/FirebasePerformance/Tests/Unit/Common/FPRDiagnosticsTest.m b/FirebasePerformance/Tests/Unit/Common/FPRDiagnosticsTest.m
index 91d4f3220ab..52647a65789 100644
--- a/FirebasePerformance/Tests/Unit/Common/FPRDiagnosticsTest.m
+++ b/FirebasePerformance/Tests/Unit/Common/FPRDiagnosticsTest.m
@@ -80,7 +80,9 @@ - (void)testFPRAssertSpeed {
 
 /** Tests that FPRAssert actually asserts (when NS_BLOCK_ASSERTIONS=0|undefined). */
 - (void)testFPRAssert {
-  XCTAssertThrows(FPRAssert(NO, @"This is a failed assert!"));
+  XCTAssertThrows(^{
+    FPRAssert(NO, @"This is a failed assert!");
+  }());
 }
 
 /** Tests emit diagnostics methods. */