diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3acbbcf..ffe7b00 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,16 +1,27 @@
-<a name="1.0.1"></a>
+# Change Log
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/)
+and this project adheres to [Semantic Versioning](http://semver.org/).
+
+<!-- next-header -->
+
+## [Unreleased] - ReleaseDate
+
+#### Fixes
+
+- Be explicit about spawn failure (closes [#109](https://github.com/assert-rs/assert_cmd/issues/109)).
+
 ## 1.0.1 (2020-03-30)
 
 #### Fixes
 
 - Reduce dependencies.
 
-<a name="1.0.0"></a>
 ## 1.0.0 (2020-03-26)
 
 Stable release!
 
-<a name="0.12.2"></a>
 ## 0.12.2 (2020-03-26)
 
 #### Features
@@ -18,7 +29,6 @@ Stable release!
 * **cmd**:
   * Support timeouts (closes [#10](https://github.com/assert-rs/assert_cmd/issues/20)).
 
-<a name="0.12.1"></a>
 ## 0.12.1 (2020-03-25)
 
 
@@ -27,7 +37,6 @@ Stable release!
 * **cmd**:
   * Avoid stdin/stdout deadlocks by writing/reading in parallel (closes [#42](https://github.com/assert-rs/assert_cmd/issues/42)).
 
-<a name="0.12.0"></a>
 ## 0.12.0 (2019-12-05)
 
 
@@ -43,7 +52,6 @@ Stable release!
 
 
 
-<a name="0.11.1"></a>
 ## 0.11.1 (2019-03-23)
 
 
@@ -53,7 +61,6 @@ Stable release!
 
 
 
-<a name="0.11.0"></a>
 ## 0.11.0 (2019-01-29)
 
 
@@ -68,7 +75,6 @@ Stable release!
   * See the [`assert_cmd::cargo` docs](https://docs.rs/assert_cmd/0.11.0/assert_cmd/cargo/index.html) for trade-offs with when to use `escargot` vs `assert_cmd`
 
 
-<a name="0.10.2"></a>
 ## 0.10.2 (2018-11-21)
 
 
@@ -81,7 +87,6 @@ Stable release!
 
 
 
-<a name="0.10.1"></a>
 ## 0.10.1 (2018-10-10)
 
 
@@ -90,7 +95,6 @@ Stable release!
 * Documentation fixes
 
 
-<a name="0.10.0"></a>
 ## 0.10.0 (2018-10-10)
 
 
@@ -107,7 +111,6 @@ Stable release!
 
 
 
-<a name="0.9.1"></a>
 ## 0.9.1 (2018-08-09)
 
 
@@ -117,7 +120,6 @@ Stable release!
 
 
 
-<a name="0.9.0"></a>
 ## 0.9.0 (2018-08-02)
 
 
@@ -140,7 +142,6 @@ Stable release!
 
 
 
-<a name="0.5.0"></a>
 ## 0.6.0 (2018-07-18)
 
 
@@ -154,7 +155,6 @@ Stable release!
 
 
 
-<a name="0.5.0"></a>
 ## 0.5.0 (2018-07-13)
 
 
@@ -168,7 +168,6 @@ Stable release!
 
 
 
-<a name="0.4.0"></a>
 ## 0.4.0 (2018-06-28)
 
 
@@ -188,7 +187,6 @@ Stable release!
 
 
 
-<a name="0.3.0"></a>
 ## 0.3.0 (2018-06-07)
 
 ### Features
@@ -200,7 +198,6 @@ Stable release!
 * Moved all cargo stuff under `cargo` module.
 
 
-<a name="0.2.0"></a>
 ## 0.2.0 (2018-06-06)
 
 
@@ -216,3 +213,7 @@ Stable release!
 
 *   Change to predicates v0.5.0 ([5fa02435](https://github.com/assert-rs/assert_cmd/commit/5fa02435ffee0a3fb5f94fa374437ae71201f7d7))
 *   Simplify stdout/stderr str predicates ([8cdfb91e](https://github.com/assert-rs/assert_cmd/commit/8cdfb91e0f7a535d3d2b9fbb21f0df5d236a0f0a), closes [#11](https://github.com/assert-rs/assert_cmd/issues/11))
+
+
+<!-- next-url -->
+[Unreleased]: https://github.com/assert-rs/assert_cmd/compare/v1.0.1...HEAD
diff --git a/release.toml b/release.toml
index fe86cf3..28c107e 100644
--- a/release.toml
+++ b/release.toml
@@ -5,4 +5,9 @@ tag-name = "{{prefix}}v{{version}}"
 pre-release-replacements = [
   {file="README.md", search="assert_cmd = .*", replace="assert_cmd = \"{{version}}\""},
   {file="src/lib.rs", search="assert_cmd = .*", replace="assert_cmd = \"{{version}}\""},
+  {file="CHANGELOG.md", search="Unreleased", replace="{{version}}"},
+  {file="CHANGELOG.md", search="\\.\\.\\.HEAD", replace="...{{tag_name}}"},
+  {file="CHANGELOG.md", search="ReleaseDate", replace="{{date}}"},
+  {file="CHANGELOG.md", search="<!-- next-header -->", replace="<!-- next-header -->\n## [Unreleased] - ReleaseDate"},
+  {file="CHANGELOG.md", search="<!-- next-url -->", replace="<!-- next-url -->\n[Unreleased]: https://github.com/assert-rs/predicates-rs/compare/{{tag_name}}...HEAD"},
 ]
diff --git a/src/assert.rs b/src/assert.rs
index 1a9da89..60c5505 100644
--- a/src/assert.rs
+++ b/src/assert.rs
@@ -57,7 +57,12 @@ impl OutputAssertExt for process::Output {
 
 impl<'c> OutputAssertExt for &'c mut process::Command {
     fn assert(self) -> Assert {
-        let output = self.output().unwrap();
+        let output = match self.output() {
+            Ok(output) => output,
+            Err(err) => {
+                panic!("Failed to spawn {:?}: {}", self, err);
+            }
+        };
         Assert::new(output).append_context("command", format!("{:?}", self))
     }
 }