diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 870f36f69b5..a3c9a867ef3 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -51,7 +51,7 @@ jobs:
         run: cabal v2-build --builddir "C://dist" Win32-network
 
       # - name: Test Win32-network
-        # run: cabal v2-run --builddir "C:\\dist" test-Win32-network
+        # run: cabal v2-run --builddir "C://dist" test-Win32-network
 
       # ntp-client
       - name: Build ntp-client dependencies
@@ -60,8 +60,8 @@ jobs:
       - name: Build ntp-client
         run: cabal v2-build --builddir "C://dist" ntp-client
 
-      # - name: Test ntp-client
-        # run: cabal v2-run test-ntp-client
+      - name: Test ntp-client
+        run: cabal v2-run test-ntp-client
 
 
       # io-sim-classes
@@ -71,9 +71,6 @@ jobs:
       - name: Build io-sim-classes
         run: cabal v2-build --builddir "C://dist" io-sim-classes
 
-      # - name: Test io-sim
-        # run: cabal v2-run test-sim
-
 
       # io-sim
       - name: Build io-sim dependencies
@@ -82,6 +79,9 @@ jobs:
       - name: Build io-sim
         run: cabal v2-build --builddir "C://dist" io-sim
 
+      - name: Test io-sim
+        run: cabal v2-run --builddir "C://dist" test-sim
+
 
       # typed-protocols
       - name: Build typed-protcols dependencies
@@ -98,8 +98,8 @@ jobs:
       - name: Build typed-protocols-examples
         run: cabal v2-build --builddir "C://dist" typed-protocols-examples
 
-      # - name: Test typed-protocols-examples
-        # run: cabal v2-run --builddir "C://dist" typed-protocols-tests
+      - name: Test typed-protocols-examples
+        run: cabal v2-run --builddir "C://dist" typed-protocols-tests
 
 
       # network-mux
@@ -109,8 +109,8 @@ jobs:
       - name: Build typed-protocols
         run: cabal v2-build --builddir "C://dist" network-mux
 
-      # - name: Test network-mux
-        # run: cabal v2-run --builddir "C://dist" test-network-mux
+      - name: Test network-mux
+        run: cabal v2-run --builddir "C://dist" test-network-mux
 
 
       # ouroboros-network-framework
@@ -120,8 +120,8 @@ jobs:
       - name: Build ouroboros-network-framework
         run: cabal v2-build --builddir "C://dist" ouroboros-network-framework
 
-      # - name: Test ourobors-network-framework
-        # run: cabal v2-run --builddir "C://dist" test-framework
+      - name: Test ourobors-network-framework
+        run: cabal v2-run --builddir "C://dist" test-framework
 
 
       # ouroboros-network
@@ -131,8 +131,8 @@ jobs:
       - name: Build ouroboros-network
         run: cabal v2-build --builddir "C://dist" ouroboros-network
 
-      # - name: Test ouroboros-network
-        # run: cabal v2-run --builddir "C://dist" test-network
+      - name: Test ouroboros-network
+        run: cabal v2-run --builddir "C://dist" test-network
 
       # TODO: we need to install the cddl tool
       # - name: Test CDDL spec