diff --git a/tests/smoke/support/temp_project.rs b/tests/smoke/support/temp_project.rs
index 4be937647..d7553efb4 100644
--- a/tests/smoke/support/temp_project.rs
+++ b/tests/smoke/support/temp_project.rs
@@ -304,14 +304,14 @@ impl TempProject {
     /// Example:
     ///     assert_that(p.volta("use node 9.5"), execs());
     pub fn volta(&self, cmd: &str) -> ProcessBuilder {
-        let mut p = self.process(&volta_exe());
+        let mut p = self.process(volta_exe());
         split_and_add_args(&mut p, cmd);
         p
     }
 
     /// Create a `ProcessBuilder` to run Node.
     pub fn node(&self, cmd: &str) -> ProcessBuilder {
-        let mut p = self.process(&self.node_exe());
+        let mut p = self.process(self.node_exe());
         split_and_add_args(&mut p, cmd);
         p
     }
@@ -322,7 +322,7 @@ impl TempProject {
 
     /// Create a `ProcessBuilder` to run Yarn.
     pub fn yarn(&self, cmd: &str) -> ProcessBuilder {
-        let mut p = self.process(&self.yarn_exe());
+        let mut p = self.process(self.yarn_exe());
         split_and_add_args(&mut p, cmd);
         p
     }
@@ -333,7 +333,7 @@ impl TempProject {
 
     /// Create a `ProcessBuilder` to run Npm.
     pub fn npm(&self, cmd: &str) -> ProcessBuilder {
-        let mut p = self.process(&self.npm_exe());
+        let mut p = self.process(self.npm_exe());
         split_and_add_args(&mut p, cmd);
         p
     }