diff --git a/lib/syntax_suggest/code_search.rb b/lib/syntax_suggest/code_search.rb
index f43a851..7628dcd 100644
--- a/lib/syntax_suggest/code_search.rb
+++ b/lib/syntax_suggest/code_search.rb
@@ -43,7 +43,7 @@ class CodeSearch
 
     def initialize(source, record_dir: DEFAULT_VALUE)
       record_dir = if record_dir == DEFAULT_VALUE
-        ENV["SYNTAX_SUGGEST_RECORD_DIR"] || ENV["SYNTAX_SUGGEST_DEBUG"] ? "tmp" : nil
+        (ENV["SYNTAX_SUGGEST_RECORD_DIR"] || ENV["SYNTAX_SUGGEST_DEBUG"]) ? "tmp" : nil
       else
         record_dir
       end
diff --git a/lib/syntax_suggest/display_invalid_blocks.rb b/lib/syntax_suggest/display_invalid_blocks.rb
index 32ec002..5e79b3a 100644
--- a/lib/syntax_suggest/display_invalid_blocks.rb
+++ b/lib/syntax_suggest/display_invalid_blocks.rb
@@ -14,7 +14,7 @@ def initialize(code_lines:, blocks:, io: $stderr, filename: nil, terminal: DEFAU
       @filename = filename
       @code_lines = code_lines
 
-      @terminal = terminal == DEFAULT_VALUE ? io.isatty : terminal
+      @terminal = (terminal == DEFAULT_VALUE) ? io.isatty : terminal
     end
 
     def document_ok?