diff --git a/source/dub/compilers/utils.d b/source/dub/compilers/utils.d
index e3638f1..6d3217b 100644
--- a/source/dub/compilers/utils.d
+++ b/source/dub/compilers/utils.d
@@ -91,6 +91,24 @@
 	}
 }
 
+unittest {
+	version (Windows) {
+		assert(isLinkerFile("test.obj"));
+		assert(isLinkerFile("test.lib"));
+		assert(isLinkerFile("test.res"));
+		assert(!isLinkerFile("test.o"));
+		assert(!isLinkerFile("test.d"));
+	} else {
+		assert(isLinkerFile("test.o"));
+		assert(isLinkerFile("test.a"));
+		assert(isLinkerFile("test.so"));
+		assert(isLinkerFile("test.dylib"));
+		assert(!isLinkerFile("test.obj"));
+		assert(!isLinkerFile("test.d"));
+	}
+}
+
+
 /**
 	Replaces each referenced import library by the appropriate linker flags.
 
diff --git a/source/dub/generators/build.d b/source/dub/generators/build.d
index 4d7e826..57267d3 100644
--- a/source/dub/generators/build.d
+++ b/source/dub/generators/build.d
@@ -538,20 +538,3 @@
 			return prj.path ~ f;
 	return prj.path ~ "source/app.d";
 }
-
-unittest {
-	version (Windows) {
-		assert(isLinkerFile("test.obj"));
-		assert(isLinkerFile("test.lib"));
-		assert(isLinkerFile("test.res"));
-		assert(!isLinkerFile("test.o"));
-		assert(!isLinkerFile("test.d"));
-	} else {
-		assert(isLinkerFile("test.o"));
-		assert(isLinkerFile("test.a"));
-		assert(isLinkerFile("test.so"));
-		assert(isLinkerFile("test.dylib"));
-		assert(!isLinkerFile("test.obj"));
-		assert(!isLinkerFile("test.d"));
-	}
-}