diff --git a/src/Juvix/Data/Effect/Log.hs b/src/Juvix/Data/Effect/Log.hs
index da97e25a5..dfd8d2f40 100644
--- a/src/Juvix/Data/Effect/Log.hs
+++ b/src/Juvix/Data/Effect/Log.hs
@@ -12,10 +12,10 @@ runLogIO ::
   Sem (Log ': r) a ->
   Sem r a
 runLogIO sem = do
-  liftIO (hSetBuffering stdout LineBuffering)
+  liftIO (hSetBuffering stderr LineBuffering)
   interpret
     ( \case
-        Log txt -> putStrLn txt
+        Log txt -> hPutStrLn stderr txt
     )
     sem
 
diff --git a/tests/smoke/Commands/compile-dependencies-package-juvix.smoke.yaml b/tests/smoke/Commands/compile-dependencies-package-juvix.smoke.yaml
index a29f0a8e7..f5c726762 100644
--- a/tests/smoke/Commands/compile-dependencies-package-juvix.smoke.yaml
+++ b/tests/smoke/Commands/compile-dependencies-package-juvix.smoke.yaml
@@ -63,6 +63,8 @@ tests:
         ./HelloWorld
     stdout:
       contains: Hello from dep
+    stderr:
+      contains: ""
     exit-status: 0
 
   - name: git-dependencies-success-then-offline
@@ -131,6 +133,8 @@ tests:
         ./HelloWorld
     stdout:
       contains: Hello from dep
+    stderr:
+      contains: ""
     exit-status: 0
 
   - name: git-dependencies-fetch-new-commits
@@ -228,6 +232,8 @@ tests:
         ./HelloWorld
     stdout:
       contains: This is from the second commit
+    stderr:
+      contains: ""
     exit-status: 0
 
   - name: git-dependencies-lockfile
@@ -374,6 +380,8 @@ tests:
         ./HelloWorld
     stdout:
       contains: "Hello from dep1\nHello from dep2"
+    stderr:
+      contains: ""
     exit-status: 0
 
   - name: git-dependencies-uses-generated-lockfile
@@ -454,6 +462,8 @@ tests:
         ./HelloWorld
     stdout:
       contains: Hello from dep
+    stderr:
+      contains: ""
     exit-status: 0
 
   - name: git-dependencies-uses-generated-lockfile-update
@@ -552,6 +562,8 @@ tests:
         ./HelloWorld
     stdout:
       contains: Hello from commit 2
+    stderr:
+      contains: ""
     exit-status: 0
 
   - name: git-dependencies-nested-lockfile
@@ -670,6 +682,8 @@ tests:
         ./HelloWorld
     stdout:
       contains: "Hello from dep1\nHello from dep2"
+    stderr:
+      contains: ""
     exit-status: 0
 
   - name: git-dependencies-update-ref-offline
@@ -770,6 +784,8 @@ tests:
         ./HelloWorld
     stdout:
       contains: This is from the second commit
+    stderr:
+      contains: ""
     exit-status: 0
 
   - name: git-dependencies-invalid-ref
@@ -826,10 +842,10 @@ tests:
 
         # compile project
         juvix --log-level error compile native HelloWorld.juvix
+    stdout:
+      contains: ""
     stderr:
       contains: invalid-ref
-    stdout:
-      contains: Cloning
     exit-status: 1
 
   - name: git-dependencies-invalid-url
@@ -871,10 +887,10 @@ tests:
 
         # compile project
         juvix --log-level error compile native HelloWorld.juvix
+    stdout:
+      contains: ""
     stderr:
       contains: Error
-    stdout:
-      contains: Cloning
     exit-status: 1
 
   - name: git-dependencies-offline
@@ -992,10 +1008,10 @@ tests:
 
         # compile project
         juvix --log-level error compile native HelloWorld.juvix
+    stdout:
+      contains: ""
     stderr:
       contains: juvix clean
-    stdout:
-      contains: Cloning
     exit-status: 1
 
   - name: git-dependencies-duplicate-names
@@ -1106,7 +1122,8 @@ tests:
 
         # compile project
         juvix --log-level error compile native HelloWorld.juvix
-    stderr: ""
     stdout:
+      contains: ""
+    stderr:
       contains: Cloning
     exit-status: 0
diff --git a/tests/smoke/Commands/compile-dependencies.smoke.yaml b/tests/smoke/Commands/compile-dependencies.smoke.yaml
index 82a761df3..c4ef3c052 100644
--- a/tests/smoke/Commands/compile-dependencies.smoke.yaml
+++ b/tests/smoke/Commands/compile-dependencies.smoke.yaml
@@ -61,6 +61,8 @@ tests:
         ./HelloWorld
     stdout:
       contains: Hello from dep
+    stderr:
+      contains: ""
     exit-status: 0
 
   - name: git-dependencies-success-then-offline
@@ -127,6 +129,8 @@ tests:
         ./HelloWorld
     stdout:
       contains: Hello from dep
+    stderr:
+      contains: ""
     exit-status: 0
 
   - name: git-dependencies-fetch-new-commits
@@ -219,6 +223,8 @@ tests:
         ./HelloWorld
     stdout:
       contains: This is from the second commit
+    stderr:
+      contains: ""
     exit-status: 0
 
   - name: git-dependencies-lockfile
@@ -359,6 +365,8 @@ tests:
         ./HelloWorld
     stdout:
       contains: "Hello from dep1\nHello from dep2"
+    stderr:
+      contains: ""
     exit-status: 0
 
   - name: git-dependencies-uses-generated-lockfile
@@ -437,6 +445,8 @@ tests:
         ./HelloWorld
     stdout:
       contains: Hello from dep
+    stderr:
+      contains: ""
     exit-status: 0
 
   - name: git-dependencies-uses-generated-lockfile-update
@@ -530,6 +540,8 @@ tests:
         ./HelloWorld
     stdout:
       contains: Hello from commit 2
+    stderr:
+      contains: ""
     exit-status: 0
 
   - name: git-dependencies-nested-lockfile
@@ -641,6 +653,8 @@ tests:
         ./HelloWorld
     stdout:
       contains: "Hello from dep1\nHello from dep2"
+    stderr:
+      contains: ""
     exit-status: 0
 
   - name: git-dependencies-update-ref-offline
@@ -736,6 +750,8 @@ tests:
         ./HelloWorld
     stdout:
       contains: This is from the second commit
+    stderr:
+      contains: ""
     exit-status: 0
 
   - name: git-dependencies-invalid-ref
@@ -790,10 +806,10 @@ tests:
 
         # compile project
         juvix --log-level error compile native HelloWorld.juvix
+    stdout:
+      contains: ""
     stderr:
       contains: invalid-ref
-    stdout:
-      contains: Cloning
     exit-status: 1
 
   - name: git-dependencies-invalid-url
@@ -833,10 +849,10 @@ tests:
 
         # compile project
         juvix --log-level error compile native HelloWorld.juvix
+    stdout:
+      contains: ""
     stderr:
       contains: Error
-    stdout:
-      contains: Cloning
     exit-status: 1
 
   - name: git-dependencies-offline
@@ -876,9 +892,10 @@ tests:
 
         # compile project
         juvix --log-level error --offline compile native HelloWorld.juvix
+    stdout:
+      contains: ""
     stderr:
       contains: Failed to obtain remote dependencies
-    stdout:
       matches:
         # compile should not attempt to clone the dependency
         regex: |-
@@ -950,10 +967,10 @@ tests:
 
         # compile project
         juvix --log-level error compile native HelloWorld.juvix
+    stdout:
+      contains: ""
     stderr:
       contains: juvix clean
-    stdout:
-      contains: Cloning
     exit-status: 1
 
   - name: git-dependencies-duplicate-names
@@ -1077,7 +1094,8 @@ tests:
         juvix --log-level error compile native HelloWorld.juvix
         ./HelloWorld
 
-    stderr: ""
+    stderr:
+      contains: ""
     stdout:
       matches:
         regex: "Hello from dep\n(.*?)Hello from commit2"
@@ -1145,7 +1163,8 @@ tests:
 
         # compile project
         juvix --log-level error compile native HelloWorld.juvix
-    stderr: ""
     stdout:
+      contains: ""
+    stderr:
       contains: Cloning
     exit-status: 0
diff --git a/tests/smoke/Commands/typecheck.smoke.yaml b/tests/smoke/Commands/typecheck.smoke.yaml
index e7830e1fa..cf5da7351 100644
--- a/tests/smoke/Commands/typecheck.smoke.yaml
+++ b/tests/smoke/Commands/typecheck.smoke.yaml
@@ -6,7 +6,7 @@ tests:
       - juvix
       - typecheck
     stderr:
-      equals: "Well done! It type checks\n"
+      contains: "Well done! It type checks\n"
     exit-status: 0
 
   - name: flag-help-shows-juvix-file-for-autocompletion
@@ -25,7 +25,7 @@ tests:
     args:
       - positive/Internal/Simple.juvix
     stderr:
-      equals: "Well done! It type checks\n"
+      contains: "Well done! It type checks\n"
     exit-status: 0
 
   - name: flag-only-errors
@@ -82,7 +82,7 @@ tests:
         echo 'module foo;' > foo.juvix
         juvix typecheck foo.juvix
     stderr:
-      equals: "Well done! It type checks\n"
+      contains: "Well done! It type checks\n"
     exit-status: 0
 
   - name: typecheck-package-description
diff --git a/tests/smoke/Commands/version-help-doctor.smoke.yaml b/tests/smoke/Commands/version-help-doctor.smoke.yaml
index 5b3d7926b..4b5be6268 100644
--- a/tests/smoke/Commands/version-help-doctor.smoke.yaml
+++ b/tests/smoke/Commands/version-help-doctor.smoke.yaml
@@ -19,7 +19,7 @@ tests:
         regex: |-
           ^(\d+)((\.{1}\d+)*)(\.{0})$
 
-  - name: cli-flag-help  
+  - name: cli-flag-help
     command:
       - juvix
       - --help
@@ -35,7 +35,7 @@ tests:
       - doctor
       - --offline
     exit-status: 0
-    stdout: |
+    stderr: |
       > Checking for clang...
       > Checking clang version...
       > Checking for wasm-ld...
@@ -52,7 +52,7 @@ tests:
         unset JUVIX_LLVM_DIST_PATH
         juvix doctor --verbose --offline
     exit-status: 0
-    stdout:
+    stderr:
       matches:
         regex: |-
           Found clang(.*?)using system PATH
@@ -66,7 +66,7 @@ tests:
         export JUVIX_LLVM_DIST_PATH=${CLANG_PATH%$'/bin/clang'}
         juvix doctor --verbose --offline
     exit-status: 0
-    stdout:
+    stderr:
       matches:
         regex: |-
           Found clang(.*?)using JUVIX_LLVM_DIST_PATH
@@ -79,7 +79,7 @@ tests:
         export JUVIX_LLVM_DIST_PATH=/tmp
         juvix doctor --verbose --offline
     exit-status: 0
-    stdout:
+    stderr:
       matches:
         regex: |-
           Found clang(.*?)using system PATH