diff --git a/xls/ir/value_view_test.cc b/xls/ir/value_view_test.cc
index 21363cfe6d..a754e5c92f 100644
--- a/xls/ir/value_view_test.cc
+++ b/xls/ir/value_view_test.cc
@@ -116,7 +116,7 @@ TEST(PackedBitViewTest, ExtractsUnalignedReallyBigs) {
 
   BitsRope rope(kElementWidth + kBitOffset);
   for (int i = 0; i < kBitOffset; i++) {
-    rope.push_back(0);
+    rope.push_back(0);  // NOLINT(modernize-use-bool-literals)
   }
   int current_bit = 0;
   int current_byte = 0;
@@ -146,7 +146,7 @@ template <int64_t kBitWidth>
 absl::Status TestWidthAndOffset(int bit_offset) {
   BitsRope rope(kBitWidth + bit_offset);
   for (int i = 0; i < bit_offset; i++) {
-    rope.push_back(false);
+    rope.push_back(0);  // NOLINT(modernize-use-bool-literals)
   }
   int current_bit = 0;
   int current_byte = 0;
@@ -217,7 +217,7 @@ TEST(PackedArrayViewTest, ExtractsUnaligned) {
 
   BitsRope rope(kElementBits * kNumElements + kBitOffset);
   for (int i = 0; i < kBitOffset; i++) {
-    rope.push_back(0);
+    rope.push_back(0);  // NOLINT(modernize-use-bool-literals)
   }
 
   // Fill the n'th element with n (for each element).
@@ -252,7 +252,7 @@ TEST(PackedTupleViewTest, ExtractsSimpleUnaligned) {
   BitsRope rope(TupleT::kBitCount + kBitOffset);
 
   for (int i = 0; i < kBitOffset; i++) {
-    rope.push_back(0);
+    rope.push_back(0);  // NOLINT(modernize-use-bool-literals)
   }
   // Iterate low-to-high, keeping LSb-first ordering.
   absl::Span<const Value> elements = value.elements();
diff --git a/xls/netlist/function_parser.cc b/xls/netlist/function_parser.cc
index c27d7df593..39e3d7a745 100644
--- a/xls/netlist/function_parser.cc
+++ b/xls/netlist/function_parser.cc
@@ -282,7 +282,7 @@ absl::StatusOr<Ast> Parser::ParseInvertNext() {
   // see if we have an odd or even count and apply after processing the
   // following term.
   XLS_ASSIGN_OR_RETURN(Token token, scanner_.Peek());
-  bool do_negate = 0;
+  bool do_negate = false;
   while (token.kind() == Token::Kind::kInvertFollowing) {
     XLS_RETURN_IF_ERROR(scanner_.Pop().status());
     do_negate = !do_negate;
diff --git a/xls/tools/eval_proc_main.cc b/xls/tools/eval_proc_main.cc
index 0b01445dea..9999d4f4e4 100644
--- a/xls/tools/eval_proc_main.cc
+++ b/xls/tools/eval_proc_main.cc
@@ -467,7 +467,7 @@ struct ChannelInfo {
   int64_t width = -1;
   bool port_input = false;
   // Is this ready-valid?
-  bool ready_valid = 0;
+  bool ready_valid = false;
 
   // Precalculated channel names
   std::string channel_ready;