diff --git a/libc/utils/benchmarks/LibcMemoryBenchmarkTest.cpp b/libc/utils/benchmarks/LibcMemoryBenchmarkTest.cpp
--- a/libc/utils/benchmarks/LibcMemoryBenchmarkTest.cpp
+++ b/libc/utils/benchmarks/LibcMemoryBenchmarkTest.cpp
@@ -47,7 +47,8 @@
 TEST(OffsetDistribution, NoAlignment) {
   StudyConfiguration Conf;
   Conf.BufferSize = 8192;
-  Conf.AddressAlignment = Align::None();
+  // Default constructor has no alignment.
+  Conf.AddressAlignment = Align();
   Conf.Size.To = 1;
 
   OffsetDistribution OD(Conf);
diff --git a/libc/utils/testutils/FDReaderUnix.cpp b/libc/utils/testutils/FDReaderUnix.cpp
--- a/libc/utils/testutils/FDReaderUnix.cpp
+++ b/libc/utils/testutils/FDReaderUnix.cpp
@@ -17,7 +17,8 @@
 
 FDReader::FDReader() {
   int err = ::pipe(pipefd);
-  assert(!err && "pipe(2) failed");
+  if (err)
+    llvm::report_fatal_error("pipe(2) failed");
 }
 
 FDReader::~FDReader() {