diff --git a/pyproject.toml b/pyproject.toml
index d12b55a..68a6245 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,6 @@ dynamic = ["version"]
 dependencies = [
     "CairoSVG",
     "chevron",
-    "cocotb",
     "gdstk",
     "GitPython",
     "klayout<0.30.0,>=0.29.0",
diff --git a/requirements.txt b/requirements.txt
index 2e0f05a..e77d2ab 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,8 +20,6 @@ chevron==0.14.0
     # via tt-support-tools (pyproject.toml)
 click==8.2.1
     # via yowasp-yosys
-cocotb==2.0.0
-    # via tt-support-tools (pyproject.toml)
 contourpy==1.3.3
     # via matplotlib
 cssselect2==0.8.0
@@ -34,8 +32,6 @@ distlib==0.4.0
     # via virtualenv
 filelock==3.18.0
     # via virtualenv
-find-libpython==0.4.1
-    # via cocotb
 fonttools==4.60.1
     # via matplotlib
 gdstk==0.9.60
diff --git a/testing/requirements.txt b/testing/requirements.txt
new file mode 100644
index 0000000..2b04c1e
--- /dev/null
+++ b/testing/requirements.txt
@@ -0,0 +1 @@
+cocotb==1.9.2