diff --git a/crates/env_filter/src/filter.rs b/crates/env_filter/src/filter.rs
index 34b8e46..25a55e2 100644
--- a/crates/env_filter/src/filter.rs
+++ b/crates/env_filter/src/filter.rs
@@ -18,6 +18,7 @@ use crate::ParseError;
 /// ## Example
 ///
 /// ```
+/// # #[cfg(feature = "std")] {
 /// # use std::env;
 /// use env_filter::Builder;
 ///
@@ -29,6 +30,7 @@ use crate::ParseError;
 /// }
 ///
 /// let filter = builder.build();
+/// # }
 /// ```
 pub struct Builder {
     directives: Vec<Directive>,
@@ -98,6 +100,7 @@ impl Builder {
     /// See the [Enabling Logging] section for more details.
     ///
     /// [Enabling Logging]: ../index.html#enabling-logging
+    #[cfg(feature = "std")]
     pub fn parse(&mut self, filters: &str) -> &mut Self {
         #![allow(clippy::print_stderr)] // compatibility
 
@@ -108,7 +111,6 @@ impl Builder {
         } = parse_spec(filters);
 
         for error in errors {
-            #[cfg(feature = "std")]
             eprintln!("warning: {error}, ignoring it");
         }
 
@@ -310,14 +312,17 @@ mod tests {
 
     #[test]
     fn parse_default() {
-        let logger = Builder::new().parse("info,crate1::mod1=warn").build();
+        let logger = Builder::new()
+            .try_parse("info,crate1::mod1=warn")
+            .unwrap()
+            .build();
         assert!(enabled(&logger.directives, Level::Warn, "crate1::mod1"));
         assert!(enabled(&logger.directives, Level::Info, "crate2::mod2"));
     }
 
     #[test]
     fn parse_default_bare_level_off_lc() {
-        let logger = Builder::new().parse("off").build();
+        let logger = Builder::new().try_parse("off").unwrap().build();
         assert!(!enabled(&logger.directives, Level::Error, ""));
         assert!(!enabled(&logger.directives, Level::Warn, ""));
         assert!(!enabled(&logger.directives, Level::Info, ""));
@@ -327,7 +332,7 @@ mod tests {
 
     #[test]
     fn parse_default_bare_level_off_uc() {
-        let logger = Builder::new().parse("OFF").build();
+        let logger = Builder::new().try_parse("OFF").unwrap().build();
         assert!(!enabled(&logger.directives, Level::Error, ""));
         assert!(!enabled(&logger.directives, Level::Warn, ""));
         assert!(!enabled(&logger.directives, Level::Info, ""));
@@ -337,7 +342,7 @@ mod tests {
 
     #[test]
     fn parse_default_bare_level_error_lc() {
-        let logger = Builder::new().parse("error").build();
+        let logger = Builder::new().try_parse("error").unwrap().build();
         assert!(enabled(&logger.directives, Level::Error, ""));
         assert!(!enabled(&logger.directives, Level::Warn, ""));
         assert!(!enabled(&logger.directives, Level::Info, ""));
@@ -347,7 +352,7 @@ mod tests {
 
     #[test]
     fn parse_default_bare_level_error_uc() {
-        let logger = Builder::new().parse("ERROR").build();
+        let logger = Builder::new().try_parse("ERROR").unwrap().build();
         assert!(enabled(&logger.directives, Level::Error, ""));
         assert!(!enabled(&logger.directives, Level::Warn, ""));
         assert!(!enabled(&logger.directives, Level::Info, ""));
@@ -357,7 +362,7 @@ mod tests {
 
     #[test]
     fn parse_default_bare_level_warn_lc() {
-        let logger = Builder::new().parse("warn").build();
+        let logger = Builder::new().try_parse("warn").unwrap().build();
         assert!(enabled(&logger.directives, Level::Error, ""));
         assert!(enabled(&logger.directives, Level::Warn, ""));
         assert!(!enabled(&logger.directives, Level::Info, ""));
@@ -367,7 +372,7 @@ mod tests {
 
     #[test]
     fn parse_default_bare_level_warn_uc() {
-        let logger = Builder::new().parse("WARN").build();
+        let logger = Builder::new().try_parse("WARN").unwrap().build();
         assert!(enabled(&logger.directives, Level::Error, ""));
         assert!(enabled(&logger.directives, Level::Warn, ""));
         assert!(!enabled(&logger.directives, Level::Info, ""));
@@ -377,7 +382,7 @@ mod tests {
 
     #[test]
     fn parse_default_bare_level_info_lc() {
-        let logger = Builder::new().parse("info").build();
+        let logger = Builder::new().try_parse("info").unwrap().build();
         assert!(enabled(&logger.directives, Level::Error, ""));
         assert!(enabled(&logger.directives, Level::Warn, ""));
         assert!(enabled(&logger.directives, Level::Info, ""));
@@ -387,7 +392,7 @@ mod tests {
 
     #[test]
     fn parse_default_bare_level_info_uc() {
-        let logger = Builder::new().parse("INFO").build();
+        let logger = Builder::new().try_parse("INFO").unwrap().build();
         assert!(enabled(&logger.directives, Level::Error, ""));
         assert!(enabled(&logger.directives, Level::Warn, ""));
         assert!(enabled(&logger.directives, Level::Info, ""));
@@ -397,7 +402,7 @@ mod tests {
 
     #[test]
     fn parse_default_bare_level_debug_lc() {
-        let logger = Builder::new().parse("debug").build();
+        let logger = Builder::new().try_parse("debug").unwrap().build();
         assert!(enabled(&logger.directives, Level::Error, ""));
         assert!(enabled(&logger.directives, Level::Warn, ""));
         assert!(enabled(&logger.directives, Level::Info, ""));
@@ -407,7 +412,7 @@ mod tests {
 
     #[test]
     fn parse_default_bare_level_debug_uc() {
-        let logger = Builder::new().parse("DEBUG").build();
+        let logger = Builder::new().try_parse("DEBUG").unwrap().build();
         assert!(enabled(&logger.directives, Level::Error, ""));
         assert!(enabled(&logger.directives, Level::Warn, ""));
         assert!(enabled(&logger.directives, Level::Info, ""));
@@ -417,7 +422,7 @@ mod tests {
 
     #[test]
     fn parse_default_bare_level_trace_lc() {
-        let logger = Builder::new().parse("trace").build();
+        let logger = Builder::new().try_parse("trace").unwrap().build();
         assert!(enabled(&logger.directives, Level::Error, ""));
         assert!(enabled(&logger.directives, Level::Warn, ""));
         assert!(enabled(&logger.directives, Level::Info, ""));
@@ -427,7 +432,7 @@ mod tests {
 
     #[test]
     fn parse_default_bare_level_trace_uc() {
-        let logger = Builder::new().parse("TRACE").build();
+        let logger = Builder::new().try_parse("TRACE").unwrap().build();
         assert!(enabled(&logger.directives, Level::Error, ""));
         assert!(enabled(&logger.directives, Level::Warn, ""));
         assert!(enabled(&logger.directives, Level::Info, ""));
@@ -442,7 +447,7 @@ mod tests {
     #[test]
     fn parse_default_bare_level_debug_mixed() {
         {
-            let logger = Builder::new().parse("Debug").build();
+            let logger = Builder::new().try_parse("Debug").unwrap().build();
             assert!(enabled(&logger.directives, Level::Error, ""));
             assert!(enabled(&logger.directives, Level::Warn, ""));
             assert!(enabled(&logger.directives, Level::Info, ""));
@@ -450,7 +455,7 @@ mod tests {
             assert!(!enabled(&logger.directives, Level::Trace, ""));
         }
         {
-            let logger = Builder::new().parse("debuG").build();
+            let logger = Builder::new().try_parse("debuG").unwrap().build();
             assert!(enabled(&logger.directives, Level::Error, ""));
             assert!(enabled(&logger.directives, Level::Warn, ""));
             assert!(enabled(&logger.directives, Level::Info, ""));
@@ -458,7 +463,7 @@ mod tests {
             assert!(!enabled(&logger.directives, Level::Trace, ""));
         }
         {
-            let logger = Builder::new().parse("deBug").build();
+            let logger = Builder::new().try_parse("deBug").unwrap().build();
             assert!(enabled(&logger.directives, Level::Error, ""));
             assert!(enabled(&logger.directives, Level::Warn, ""));
             assert!(enabled(&logger.directives, Level::Info, ""));
@@ -466,7 +471,7 @@ mod tests {
             assert!(!enabled(&logger.directives, Level::Trace, ""));
         }
         {
-            let logger = Builder::new().parse("DeBuG").build(); // LaTeX flavor!
+            let logger = Builder::new().try_parse("DeBuG").unwrap().build(); // LaTeX flavor!
             assert!(enabled(&logger.directives, Level::Error, ""));
             assert!(enabled(&logger.directives, Level::Warn, ""));
             assert!(enabled(&logger.directives, Level::Info, ""));
diff --git a/crates/env_filter/src/lib.rs b/crates/env_filter/src/lib.rs
index 9e7dffc..de2bf3b 100644
--- a/crates/env_filter/src/lib.rs
+++ b/crates/env_filter/src/lib.rs
@@ -11,6 +11,7 @@
 //! logged based on the parsed filters when log records are received.
 //!
 //! ```
+//! # #[cfg(feature = "std")] {
 //! use env_filter::Filter;
 //! use log::{Log, Metadata, Record};
 //!
@@ -35,6 +36,7 @@
 //! }
 //!
 //! let logger = env_filter::FilteredLog::new(PrintLogger, builder.build());
+//! # }
 //! ```
 
 #![cfg_attr(docsrs, feature(doc_cfg))]