diff --git a/.gitignore b/.gitignore
index 4c3c98b72..553e16005 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,13 +17,12 @@
 [Rr]eleases/
 x64/
 x86/
+!/core/simd/x86
 bld/
 [Bb]in/
 [Oo]bj/
 [Ll]og/
 ![Cc]ore/[Ll]og/
-tests/documentation/verify/
-tests/documentation/all.odin-doc
 # Visual Studio 2015 cache/options directory
 .vs/
 # Visual Studio Code options directory
@@ -31,7 +30,6 @@ tests/documentation/all.odin-doc
 # Uncomment if you have tasks that create the project's static files in wwwroot
 #wwwroot/
 demo
-benchmark
 
 # MSTest test Results
 [Tt]est[Rr]esult*/
diff --git a/tests/.gitignore b/tests/.gitignore
new file mode 100644
index 000000000..ce17927b4
--- /dev/null
+++ b/tests/.gitignore
@@ -0,0 +1,19 @@
+# Ignore all files.
+*
+
+# Un-ignore all directories.
+!*/
+
+# Un-ignore files with an extension.
+#
+# In conjunction with the first two rules, this should catch extensionless
+# binaries on the UNIX-like platforms.
+!*.*
+
+# But remember to ignore executables with an extension.
+*.exe
+*.bin
+
+# Ignore documentation-related files.
+/documentation/verify/
+/documentation/all.odin-doc