diff --git a/src/main/kotlin/net/theevilreaper/dartpoet/code/CodeBlock.kt b/src/main/kotlin/net/theevilreaper/dartpoet/code/CodeBlock.kt
index 86b29642..6dc3f3d4 100644
--- a/src/main/kotlin/net/theevilreaper/dartpoet/code/CodeBlock.kt
+++ b/src/main/kotlin/net/theevilreaper/dartpoet/code/CodeBlock.kt
@@ -22,6 +22,7 @@ package net.theevilreaper.dartpoet.code
 
 import net.theevilreaper.dartpoet.type.TypeName
 import net.theevilreaper.dartpoet.type.asTypeName
+import net.theevilreaper.dartpoet.util.EMPTY_STRING
 import net.theevilreaper.dartpoet.util.escapeIfNecessary
 import net.theevilreaper.dartpoet.util.isOneOf
 import net.theevilreaper.dartpoet.util.toImmutableList
@@ -342,7 +343,7 @@ class CodeBlock private constructor(
                         unused += "%" + (i + 1)
                     }
                 }
-                val s = if (unused.size == 1) "" else "s"
+                val s = if (unused.size == 1) EMPTY_STRING else "s"
                 require(unused.isEmpty()) { "unused argument$s: ${unused.joinToString(", ")}" }
             }
         }
@@ -492,8 +493,8 @@ class CodeBlock private constructor(
 @JvmOverloads
 fun Collection<CodeBlock>.joinToCode(
     separator: CharSequence = ", ",
-    prefix: CharSequence = "",
-    suffix: CharSequence = "",
+    prefix: CharSequence = EMPTY_STRING,
+    suffix: CharSequence = EMPTY_STRING,
 ): CodeBlock {
     val blocks = toTypedArray()
     val placeholders = Array(blocks.size) { "%L" }
diff --git a/src/main/kotlin/net/theevilreaper/dartpoet/code/LineWrapper.kt b/src/main/kotlin/net/theevilreaper/dartpoet/code/LineWrapper.kt
index aaca0ead..87289bb3 100644
--- a/src/main/kotlin/net/theevilreaper/dartpoet/code/LineWrapper.kt
+++ b/src/main/kotlin/net/theevilreaper/dartpoet/code/LineWrapper.kt
@@ -43,19 +43,19 @@ class LineWrapper(
      * Segments of the current line to be joined by spaces or wraps. Never empty, but contains a lone
      * empty string if no data has been emitted since the last newline.
      */
-    private val segments = mutableListOf("")
+    private val segments = mutableListOf(EMPTY_STRING)
 
     /** Number of indents in wraps. -1 if the current line has no wraps. */
     private var indentLevel = -1
 
     /** Optional prefix that will be prepended to wrapped lines. */
-    private var linePrefix = ""
+    private var linePrefix = EMPTY_STRING
 
     /** @return whether there are pending segments for the current line. */
     val hasPendingSegments get() = segments.size != 1 || segments[0].isNotEmpty()
 
     /** Emit `s` replacing its spaces with line wraps as necessary. */
-    fun append(string: String, indentLevel: Int = -1, linePrefix: String = "") {
+    fun append(string: String, indentLevel: Int = -1, linePrefix: String = EMPTY_STRING) {
         check(!closed) { "closed" }
 
         var pos = 0
diff --git a/src/main/kotlin/net/theevilreaper/dartpoet/code/writer/ParameterWriter.kt b/src/main/kotlin/net/theevilreaper/dartpoet/code/writer/ParameterWriter.kt
index 7fb52fd6..6fa4bea4 100644
--- a/src/main/kotlin/net/theevilreaper/dartpoet/code/writer/ParameterWriter.kt
+++ b/src/main/kotlin/net/theevilreaper/dartpoet/code/writer/ParameterWriter.kt
@@ -4,6 +4,7 @@ import net.theevilreaper.dartpoet.DartModifier
 import net.theevilreaper.dartpoet.code.*
 import net.theevilreaper.dartpoet.code.emitAnnotations
 import net.theevilreaper.dartpoet.parameter.ParameterSpec
+import net.theevilreaper.dartpoet.util.EMPTY_STRING
 
 /**
  * The ParameterWriter is used to write each parameter.
@@ -28,7 +29,7 @@ internal class ParameterWriter : Writeable<ParameterSpec>, InitializerAppender<P
         if (spec.type != null) {
             writer.emitCode("%T", spec.type)
         }
-        val emitNullable = if (spec.isNullable) "?·" else if (spec.type != null) "·" else ""
+        val emitNullable = if (spec.isNullable) "?·" else if (spec.type != null) "·" else EMPTY_STRING
         writer.emit(emitNullable)
         writer.emit(spec.name)
         writeInitBlock(spec, writer)