diff --git a/Formula/biosig.rb b/Formula/biosig.rb
index c19f3a65f82..5e2466564b1 100644
--- a/Formula/biosig.rb
+++ b/Formula/biosig.rb
@@ -39,7 +39,8 @@ class Biosig < Formula
   test do
     assert_match "usage: save2gdf [OPTIONS] SOURCE DEST", shell_output("#{bin}/save2gdf -h").strip
     assert_match "mV\t4274\t0x10b2\t0.001\tV", shell_output("#{bin}/physicalunits mV").strip
-    assert_match "biosig_fhir provides fhir binary template for biosignal data", shell_output("#{bin}/biosig_fhir 2>&1").strip
+    assert_match "biosig_fhir provides fhir binary template for biosignal data",
+      shell_output("#{bin}/biosig_fhir 2>&1").strip
     testpath.install resource("test")
     assert_match "NumberOfChannels", shell_output("#{bin}/save2gdf -json TEST_44x86_e1.GDF").strip
     assert_match "NumberOfChannels", shell_output("#{bin}/biosig_fhir TEST_44x86_e1.GDF").strip