diff --git a/ansi-tests/beyond-ansi/load-ba.lsp b/ansi-tests/beyond-ansi/load-ba.lsp
index 4109acc9..7e5353c9 100644
--- a/ansi-tests/beyond-ansi/load-ba.lsp
+++ b/ansi-tests/beyond-ansi/load-ba.lsp
@@ -14,6 +14,5 @@
   (load "errors-data-and-control-flow-1.lsp")
   (load "errors-data-and-control-flow-2.lsp")
   (load "errors-data-and-control-flow-3.lsp")
-  (in-package :ba-test)
-  )
-
+  (load "processes.lsp")
+  (in-package :ba-test))
diff --git a/ansi-tests/beyond-ansi/processes.lsp b/ansi-tests/beyond-ansi/processes.lsp
new file mode 100644
index 00000000..c8529189
--- /dev/null
+++ b/ansi-tests/beyond-ansi/processes.lsp
@@ -0,0 +1,120 @@
+;-*- Mode:     Lisp -*-
+;;;; Author:   Jon Godbout
+;;;; Created:  Sat May 10 06:37:41 2020
+;;;; Contains: Tests for semaphore
+
+(in-package :ba-test)
+
+(compile-and-load "ba-aux.lsp")
+
+
+;; Test semaphore
+
+(deftest semaphore-init-to-0
+    (let (test-object
+	  (my-semaphore (make-semaphore)))
+      (ccl:process-run-function
+       "sem-caller"
+       #'(lambda ()
+	   (setf test-object 'a)
+	   (wait-on-semaphore my-semaphore)
+	   (setf test-object 'b)))
+      (sleep .01)
+      (assert (eq test-object 'a))
+      (signal-semaphore my-semaphore)
+      (sleep .01)
+      (assert (eq test-object 'b)))
+  t)
+
+
+(deftest semaphore-init-to-0-two-processes
+    (let (test-object
+	  (my-semaphore (make-semaphore)))
+      (ccl:process-run-function
+       "sem-caller"
+       #'(lambda ()
+	   (push 'a test-object)
+	   (wait-on-semaphore my-semaphore)
+	   (push 'a test-object)))
+      (ccl:process-run-function
+       "sem-caller"
+       #'(lambda ()
+	   (push 'c test-object)
+	   (wait-on-semaphore my-semaphore)
+	   (push 'd test-object)))
+
+      (sleep .01)
+      (assert (or (eq test-object '(a c))
+		  (eq test-object '(c a))))
+
+      (signal-semaphore my-semaphore)
+      (assert (and (or (member 'b test-object)
+		       (member 'd test-object))
+		   (or (not (member 'b test-object))
+		       (not (member 'd test-object)))))
+
+      (signal-semaphore my-semaphore)
+      (sleep .01)
+      (assert (and (member 'b test-object)
+		   (member 'd test-object))))
+  t)
+
+
+(deftest semaphore-init-to-2
+    (let (test-object
+	  (my-semaphore (make-semaphore :count 2)))
+      (ccl:process-run-function
+       "sem-caller"
+       #'(lambda ()
+	   (setf test-object 'a)
+	   (wait-on-semaphore my-semaphore)
+	   (setf test-object 'b)))
+      ;; Seamphore is immediately grabbed since count is positive.
+      (sleep .01)
+      (assert (eq test-object 'b))
+
+      (ccl:process-run-function
+       "sem-caller"
+       #'(lambda ()
+	   (setf test-object 'c)
+	   (wait-on-semaphore my-semaphore)
+	   (setf test-object 'd)))
+
+      (sleep .01)
+      (assert (eq test-object 'd))
+
+      ;; Count becomes negative
+      (ccl:process-run-function
+       "sem-caller"
+       #'(lambda ()
+	   (setf test-object 'e)
+	   (wait-on-semaphore my-semaphore)
+	   (setf test-object 'f)))
+
+      (sleep .01)
+      (assert (eq test-object 'e))
+      (signal-semaphore my-semaphore)
+      (sleep .01)
+      (assert (eq test-object 'f)))
+  t)
+
+
+(deftest semaphore-init-to-neg-1
+    (let (test-object
+	  (my-semaphore (make-semaphore :count -1)))
+      (ccl:process-run-function
+       "sem-caller"
+       #'(lambda ()
+	   (setf test-object 'a)
+	   (wait-on-semaphore my-semaphore)
+	   (setf test-object 'b)))
+
+      (sleep .01)
+      (assert (eq test-object 'a))
+      (signal-semaphore my-semaphore)
+      (sleep .01)
+      (assert (eq test-object 'a)
+	      (signal-semaphore my-semaphore)
+	      (sleep .01)
+	      (assert (eq test-object 'b)))
+      t)