diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 926be75..3cded1a 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -10,7 +10,7 @@ on:
     branches: [ "main" ]
 
 jobs:
-  build-test:
+  build-test-linux:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
@@ -39,7 +39,7 @@ jobs:
     - name: Build
       run: go build -v ./...
 
-  build-windows:
+  build-test-windows:
     runs-on: windows-latest
     steps:
     - uses: actions/checkout@v3
@@ -51,3 +51,6 @@ jobs:
 
     - name: Build
       run: go build -v ./...
+
+    - name: Test
+      run: go test -run TestCherri -v ./...
diff --git a/copy_paste.go b/copy_paste.go
index 2242dea..e2251bf 100644
--- a/copy_paste.go
+++ b/copy_paste.go
@@ -63,11 +63,10 @@ func collectCopy() {
 
 func pasteCopy() {
 	var identifier = collectIdentifier()
-	if char == '\n' {
-		idx--
-		lineIdx--
-		lineCharIdx = len(lines[lineIdx])
+	if isEOL() || char == -1 {
+		reverse()
 	}
+
 	if contents, found := pasteables[identifier]; found {
 		lines[lineIdx] = contents
 	} else {
diff --git a/go.mod b/go.mod
index b59330f..a5f2fcd 100644
--- a/go.mod
+++ b/go.mod
@@ -5,3 +5,9 @@ go 1.22
 require github.com/google/uuid v1.6.0
 
 require github.com/electrikmilk/args-parser v1.1.3
+
+require (
+	sourcecode.social/reiver/go-eol v0.0.0-20240326064055-6080dd101592 // indirect
+	sourcecode.social/reiver/go-erorr v0.0.0-20230922202459-231149d185a1 // indirect
+	sourcecode.social/reiver/go-opt v0.0.0-20231106172254-6b4ca5231f41 // indirect
+)
diff --git a/go.sum b/go.sum
index db4deb6..014644d 100644
--- a/go.sum
+++ b/go.sum
@@ -2,3 +2,9 @@ github.com/electrikmilk/args-parser v1.1.3 h1:66xFYBDmsO3mZvIM1ThO/AV/3zTRwfE45A
 github.com/electrikmilk/args-parser v1.1.3/go.mod h1:mb/l2JFNNBSA8GVYL0eQCJF6Jd7UtAJTpenLZs6iIJ0=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+sourcecode.social/reiver/go-eol v0.0.0-20240326064055-6080dd101592 h1:5lIRVxewoVEKA8AB/xLirgx16VVGAvYY15BWZzLQdh0=
+sourcecode.social/reiver/go-eol v0.0.0-20240326064055-6080dd101592/go.mod h1:2OmaB7yZ5/S7rix/3mhFkLZ1HwkgCBt6NqdB4fFGQjI=
+sourcecode.social/reiver/go-erorr v0.0.0-20230922202459-231149d185a1 h1:wpnz4JicQBLWrgGphYBls7DysIFCcnWgDz/vce/sY8E=
+sourcecode.social/reiver/go-erorr v0.0.0-20230922202459-231149d185a1/go.mod h1:NFtd7fzEf0r6A6R7JXYZfayRhPaJy0zt/18VWoLzrxA=
+sourcecode.social/reiver/go-opt v0.0.0-20231106172254-6b4ca5231f41 h1:nWUCtY3Krm+bLKXEEFvVz+vm256v3D/iJXgfoWhcOEw=
+sourcecode.social/reiver/go-opt v0.0.0-20231106172254-6b4ca5231f41/go.mod h1:O6WKM2UcKkheRT/dA6A2b1tW0m+WenSbxdcXE+idxzI=
diff --git a/parser.go b/parser.go
index 3a6ad55..72c7792 100644
--- a/parser.go
+++ b/parser.go
@@ -12,6 +12,7 @@ import (
 	"os"
 	"regexp"
 	"slices"
+	"sourcecode.social/reiver/go-eol"
 	"strconv"
 	"strings"
 	"unicode"
@@ -163,7 +164,7 @@ func printParsingDebug() {
 
 func parse() {
 	switch {
-	case char == ' ' || char == '\t' || char == '\n':
+	case isWhitespace():
 		advance()
 	case tokenAhead(Question):
 		collectQuestion()
@@ -251,7 +252,7 @@ func lookAheadUntil(until rune) string {
 	var ahead strings.Builder
 	var nextIdx = idx
 	var nextChar rune
-	for nextChar != until {
+	for !cmpChar(nextChar, until) {
 		if len(chars) <= nextIdx {
 			break
 		}
@@ -430,7 +431,7 @@ func collectArguments() (arguments []actionArgument) {
 	var argIndex = 0
 	var param parameterDefinition
 	for {
-		if char == ')' || char == '\n' || char == -1 {
+		if char == ')' || isEOL() || char == -1 {
 			break
 		}
 		if argIndex < paramsSize {
@@ -1297,6 +1298,40 @@ func collectAction(identifier *string) (value action) {
 	return
 }
 
+// isEOL returns bool based on if current char is an isEOL.
+func isEOL() bool {
+	return eol.IsEOL(char)
+}
+
+func skipWhitespace() {
+	for isWhitespace() {
+		advance()
+	}
+}
+
+func isWhitespace() bool {
+	return unicode.IsSpace(char) || isEOL() || char == '\t' || char == ' ' || char == '\n'
+}
+
+func isCurrentChar(ch rune) bool {
+	if ch == '\n' {
+		return eol.IsEOL(char)
+	}
+
+	return ch == char
+}
+
+func cmpChar(ch1 rune, ch2 rune) bool {
+	if ch1 == '\n' {
+		return eol.IsEOL(ch2)
+	}
+	if ch2 == '\n' {
+		return eol.IsEOL(ch1)
+	}
+
+	return ch1 == ch2
+}
+
 // advance advances the character cursor.
 func advance() {
 	idx++
@@ -1306,7 +1341,7 @@ func advance() {
 	}
 
 	char = chars[idx]
-	if char == '\n' {
+	if isEOL() {
 		lineCharIdx = 0
 		lineIdx++
 	} else {
@@ -1314,6 +1349,21 @@ func advance() {
 	}
 }
 
+// reverse reverses the character cursor.
+func reverse() {
+	idx--
+	if idx < 0 {
+		char = -1
+		return
+	}
+	if lineCharIdx == 0 {
+		lineIdx--
+	}
+
+	lineCharIdx = len(lines[lineIdx])
+	char = chars[idx]
+}
+
 // advanceTimes advances the character cursor by `times`.
 func advanceTimes(times int) {
 	for i := 0; i < times; i++ {
@@ -1323,7 +1373,7 @@ func advanceTimes(times int) {
 
 // advanceUntil advances the character cursor until we reach `ch`.
 func advanceUntil(ch rune) {
-	for char != ch && char != -1 {
+	for !isCurrentChar(ch) && char != -1 {
 		advance()
 	}
 }
@@ -1332,7 +1382,7 @@ func advanceUntil(ch rune) {
 // However, it expects to reach this character by no more than `maxAdvances` advances and throws a parser error if it doesn't.
 func advanceUntilExpect(ch rune, maxAdvances int) {
 	var advances int
-	for char != ch && char != -1 {
+	for !isCurrentChar(ch) && char != -1 {
 		if advances > maxAdvances {
 			parserError(fmt.Sprintf("Expected %c", ch))
 		}
@@ -1343,7 +1393,7 @@ func advanceUntilExpect(ch rune, maxAdvances int) {
 
 // If char is tokenChar, advance.
 func isChar(tokenChar rune) bool {
-	if char != tokenChar {
+	if !isCurrentChar(tokenChar) {
 		return false
 	}
 	advance()
@@ -1417,12 +1467,6 @@ func firstChar() {
 	advance()
 }
 
-func skipWhitespace() {
-	for char == ' ' || char == '\t' || char == '\n' {
-		advance()
-	}
-}
-
 func printVariables() {
 	for identifier, v := range variables {
 		if v.constant {