diff --git a/src/finder.coffee b/src/finder.coffee
index 57e9d66..e8448c9 100644
--- a/src/finder.coffee
+++ b/src/finder.coffee
@@ -10,11 +10,11 @@ export class Finder
 		{extensions = [], paths = []} = options
 
 		unless extensions.length
-			pathExt = process.env.PATHEXT ? ""
+			pathExt = process.env.PATHEXT or ""
 			extensions = if pathExt then pathExt.split ";" else [".exe", ".cmd", ".bat", ".com"]
 
 		unless paths.length
-			pathEnv = process.env.PATH ? ""
+			pathEnv = process.env.PATH or ""
 			paths = if pathEnv then pathEnv.split(if Finder.isWindows then ";" else delimiter) else []
 
 		# The list of executable file extensions.
diff --git a/test/finder_test.coffee b/test/finder_test.coffee
index 6057cfe..8b216a6 100644
--- a/test/finder_test.coffee
+++ b/test/finder_test.coffee
@@ -8,12 +8,12 @@ import {describe, it} from "node:test"
 describe "Finder", ->
 	describe "constructor()", ->
 		it "should set the `paths` property to the value of the `PATH` environment variable by default", ->
-			pathEnv = env.PATH ? ""
+			pathEnv = env.PATH or ""
 			paths = new Set if pathEnv then pathEnv.split(if Finder.isWindows then ";" else delimiter).filter (item) -> item.length else []
 			equal new Finder().paths.symmetricDifference(paths).size, 0
 
 		it "should set the `extensions` property to the value of the `PATHEXT` environment variable by default", ->
-			pathExt = env.PATHEXT ? ""
+			pathExt = env.PATHEXT or ""
 			extensions = new Set if pathExt then pathExt.split(";").map (item) -> item.toLowerCase() else [".exe", ".cmd", ".bat", ".com"]
 			equal new Finder().extensions.symmetricDifference(extensions).size, 0