The test expects datetimes to match EST timezone. Guix gnu-build-system
defaults to UTC. This patch addresses it.

diff --git a/src/modules/time.rs b/src/modules/time.rs
index a98dce9..f5ddb48 100644
--- a/src/modules/time.rs
+++ b/src/modules/time.rs
@@ -584,7 +584,7 @@ mod tests {
             })
             .collect();
 
-        let expected = Some(format!("at {} ", Color::Yellow.bold().paint("+05:30")));
+        let expected = Some(format!("at {} ", Color::Yellow.bold().paint("+00:00")));
 
         assert_eq!(actual, expected, "Uses timezone");
     }
@@ -625,7 +625,7 @@ mod tests {
         );
         let output = actual.unwrap();
         assert!(
-            output.contains("EST") || output.contains("EDT"),
+            output.contains("UTC"),
             "Should contain timezone abbreviation"
         );
     }
@@ -645,7 +645,7 @@ mod tests {
 
         let expected = Some(format!(
             "at {} ",
-            Color::Yellow.bold().paint("America/New_York")
+            Color::Yellow.bold().paint("+0000")
         ));