[DOC] Update to use `SPECOPTS` instead of `MSPECOPT`

1 files changed, 6 insertions, 6 deletions

diff --git a/doc/contributing/testing_ruby.md b/doc/contributing/testing_ruby.md
index 167ab55c55..8decc24083 100644
--- a/doc/contributing/testing_ruby.md
+++ b/doc/contributing/testing_ruby.md
@@ -99,28 +99,28 @@ We can run any of the make scripts [in parallel](building_ruby.md#label-Running+
     make test-spec
     ```
 
-    To run a specific directory, we can use `MSPECOPT` to specify the directory:
+    To run a specific directory, we can use `SPECOPTS` to specify the directory:
 
     ```
-    make test-spec MSPECOPT=spec/ruby/core/array
+    make test-spec SPECOPTS=spec/ruby/core/array
     ```
 
-    To run a specific file, we can also use `MSPECOPT` to specify the file:
+    To run a specific file, we can also use `SPECOPTS` to specify the file:
 
     ```
-    make test-spec MSPECOPT=spec/ruby/core/array/any_spec.rb
+    make test-spec SPECOPTS=spec/ruby/core/array/any_spec.rb
     ```
 
     To run a specific test, we can use the `--example` flag to match against the test name:
 
     ```
-    make test-spec MSPECOPT="../spec/ruby/core/array/any_spec.rb --example='is false if the array is empty'"
+    make test-spec SPECOPTS="../spec/ruby/core/array/any_spec.rb --example='is false if the array is empty'"
     ```
 
     To run these specs with logs, we can use:
 
     ```
-    make test-spec MSPECOPT=-Vfs
+    make test-spec SPECOPTS=-Vfs
     ```
 
     To run a ruby-spec file or directory with GNU make, we can use