diff --git a/tests/testsuite/features.rs b/tests/testsuite/features.rs
index 9962d1d02..a06572588 100644
--- a/tests/testsuite/features.rs
+++ b/tests/testsuite/features.rs
@@ -1,10 +1,9 @@
 use std::fs::File;
 use std::io::prelude::*;
 
-use support::hamcrest::assert_that;
 use support::paths::CargoPathExt;
 use support::registry::Package;
-use support::{basic_manifest, execs, project};
+use support::{basic_manifest, project};
 
 #[test]
 fn invalid1() {
@@ -423,7 +422,7 @@ fn no_feature_doesnt_build() {
 ",
             dir = p.url()
         )).run();
-    assert_that(p.process(&p.bin("foo")), execs().with_stdout(""));
+    p.process(&p.bin("foo")).with_stdout("").run();
 
     p.cargo("build --features bar")
         .with_stderr(format!(
@@ -434,7 +433,7 @@ fn no_feature_doesnt_build() {
 ",
             dir = p.url()
         )).run();
-    assert_that(p.process(&p.bin("foo")), execs().with_stdout("bar\n"));
+    p.process(&p.bin("foo")).with_stdout("bar\n").run();
 }
 
 #[test]
@@ -478,7 +477,7 @@ fn default_feature_pulled_in() {
 ",
             dir = p.url()
         )).run();
-    assert_that(p.process(&p.bin("foo")), execs().with_stdout("bar\n"));
+    p.process(&p.bin("foo")).with_stdout("bar\n").run();
 
     p.cargo("build --no-default-features")
         .with_stderr(format!(
@@ -488,7 +487,7 @@ fn default_feature_pulled_in() {
 ",
             dir = p.url()
         )).run();
-    assert_that(p.process(&p.bin("foo")), execs().with_stdout(""));
+    p.process(&p.bin("foo")).with_stdout("").run();
 }
 
 #[test]
diff --git a/tests/testsuite/freshness.rs b/tests/testsuite/freshness.rs
index 37b18ff2e..570833a17 100644
--- a/tests/testsuite/freshness.rs
+++ b/tests/testsuite/freshness.rs
@@ -5,7 +5,7 @@ use support::hamcrest::{assert_that, existing_file};
 use support::paths::CargoPathExt;
 use support::registry::Package;
 use support::sleep_ms;
-use support::{basic_manifest, execs, path2url, project};
+use support::{basic_manifest, path2url, project};
 
 #[test]
 fn modifying_and_moving() {
@@ -435,7 +435,7 @@ fn changing_bin_features_caches_targets() {
 [FINISHED] dev [unoptimized + debuginfo] target(s) in [..]
 ",
         ).run();
-    assert_that(foo_proc("off1"), execs().with_stdout("feature off"));
+    foo_proc("off1").with_stdout("feature off").run();
 
     p.cargo("build --features foo")
         .with_stderr(
@@ -444,7 +444,7 @@ fn changing_bin_features_caches_targets() {
 [FINISHED] dev [unoptimized + debuginfo] target(s) in [..]
 ",
         ).run();
-    assert_that(foo_proc("on1"), execs().with_stdout("feature on"));
+    foo_proc("on1").with_stdout("feature on").run();
 
     /* Targets should be cached from the first build */
 
@@ -454,7 +454,7 @@ fn changing_bin_features_caches_targets() {
 [FINISHED] dev [unoptimized + debuginfo] target(s) in [..]
 ",
         ).run();
-    assert_that(foo_proc("off2"), execs().with_stdout("feature off"));
+    foo_proc("off2").with_stdout("feature off").run();
 
     p.cargo("build --features foo")
         .with_stderr(
@@ -462,7 +462,7 @@ fn changing_bin_features_caches_targets() {
 [FINISHED] dev [unoptimized + debuginfo] target(s) in [..]
 ",
         ).run();
-    assert_that(foo_proc("on2"), execs().with_stdout("feature on"));
+    foo_proc("on2").with_stdout("feature on").run();
 }
 
 #[test]
diff --git a/tests/testsuite/git.rs b/tests/testsuite/git.rs
index 5e9bd4441..3e057adab 100644
--- a/tests/testsuite/git.rs
+++ b/tests/testsuite/git.rs
@@ -700,7 +700,7 @@ fn two_revs_same_deps() {
 
     foo.cargo("build -v").run();
     assert_that(&foo.bin("foo"), existing_file());
-    assert_that(foo.process(&foo.bin("foo")), execs());
+    foo.process(&foo.bin("foo")).run();
 }
 
 #[test]
@@ -1173,7 +1173,7 @@ fn stale_cached_version() {
         ).build();
 
     foo.cargo("build").run();
-    assert_that(foo.process(&foo.bin("foo")), execs());
+    foo.process(&foo.bin("foo")).run();
 
     // Update the repo, and simulate someone else updating the lockfile and then
     // us pulling it down.
@@ -1223,7 +1223,7 @@ fn stale_cached_version() {
             bar = bar.url(),
             foo = foo.url()
         )).run();
-    assert_that(foo.process(&foo.bin("foo")), execs());
+    foo.process(&foo.bin("foo")).run();
 }
 
 #[test]
diff --git a/tests/testsuite/jobserver.rs b/tests/testsuite/jobserver.rs
index 29156007c..d2d033307 100644
--- a/tests/testsuite/jobserver.rs
+++ b/tests/testsuite/jobserver.rs
@@ -2,8 +2,7 @@ use std::net::TcpListener;
 use std::process::Command;
 use std::thread;
 
-use support::hamcrest::assert_that;
-use support::{cargo_exe, execs, project};
+use support::{cargo_exe, project};
 
 #[test]
 fn jobserver_exists() {
@@ -150,13 +149,11 @@ all:
         drop((a2, a3));
     });
 
-    assert_that(
-        p.process(make)
-            .env("CARGO", cargo_exe())
-            .env("ADDR", addr.to_string())
-            .arg("-j2"),
-        execs(),
-    );
+    p.process(make)
+        .env("CARGO", cargo_exe())
+        .env("ADDR", addr.to_string())
+        .arg("-j2")
+        .run();
     child.join().unwrap();
 }
 
@@ -181,15 +178,15 @@ all:
 ",
         ).build();
 
-    assert_that(
-        p.process(make).env("CARGO", cargo_exe()).arg("-j2"),
-        execs().with_stderr(
+    p.process(make)
+        .env("CARGO", cargo_exe())
+        .arg("-j2")
+        .with_stderr(
             "\
 warning: a `-j` argument was passed to Cargo but Cargo is also configured \
 with an external jobserver in its environment, ignoring the `-j` parameter
 [COMPILING] [..]
 [FINISHED] [..]
 ",
-        ),
-    );
+        ).run();
 }
diff --git a/tests/testsuite/support/mod.rs b/tests/testsuite/support/mod.rs
index 2da3ef36a..8613e394c 100644
--- a/tests/testsuite/support/mod.rs
+++ b/tests/testsuite/support/mod.rs
@@ -374,10 +374,10 @@ impl Project {
     ///             p.process(&p.bin("foo")),
     ///             execs().with_stdout("bar\n"),
     ///         );
-    pub fn process<T: AsRef<OsStr>>(&self, program: T) -> ProcessBuilder {
+    pub fn process<T: AsRef<OsStr>>(&self, program: T) -> Execs {
         let mut p = ::support::process(program);
         p.cwd(self.root());
-        p
+        execs().with_process_builder(p)
     }
 
     /// Create a `ProcessBuilder` to run cargo.
@@ -385,9 +385,11 @@ impl Project {
     /// Example:
     ///     p.cargo("build --bin foo").run();
     pub fn cargo(&self, cmd: &str) -> Execs {
-        let mut p = self.process(&cargo_exe());
-        split_and_add_args(&mut p, cmd);
-        execs().with_process_builder(p)
+        let mut execs = self.process(&cargo_exe());
+        if let Some(ref mut p) = execs.process_builder {
+            split_and_add_args(p, cmd);
+        }
+        execs
     }
 
     /// Returns the contents of `Cargo.lock`.
@@ -1272,18 +1274,6 @@ impl<'t> ham::Matcher<ProcessBuilder> for &'t mut Execs {
     }
 }
 
-impl<'a> ham::Matcher<&'a mut ProcessBuilder> for Execs {
-    fn matches(&self, process: &'a mut ProcessBuilder) -> ham::MatchResult {
-        self.match_process(process)
-    }
-}
-
-impl<'a, 't> ham::Matcher<&'a mut ProcessBuilder> for &'t mut Execs {
-    fn matches(&self, process: &'a mut ProcessBuilder) -> ham::MatchResult {
-        self.match_process(process)
-    }
-}
-
 impl ham::Matcher<Output> for Execs {
     fn matches(&self, output: Output) -> ham::MatchResult {
         self.match_output(&output)
diff --git a/tests/testsuite/test.rs b/tests/testsuite/test.rs
index 9b1c7db67..7e45c8ff3 100644
--- a/tests/testsuite/test.rs
+++ b/tests/testsuite/test.rs
@@ -1722,10 +1722,9 @@ fn example_bin_same_name() {
     assert_that(&p.bin("foo"), is_not(existing_file()));
     assert_that(&p.bin("examples/foo"), existing_file());
 
-    assert_that(
-        p.process(&p.bin("examples/foo")),
-        execs().with_stdout("example\n"),
-    );
+    p.process(&p.bin("examples/foo"))
+        .with_stdout("example\n")
+        .run();
 
     p.cargo("run")
         .with_stderr(