diff --git a/brush-shell/tests/cases/builtins/command.yaml b/brush-shell/tests/cases/builtins/command.yaml
index c2f5e73d..8bfe9495 100644
--- a/brush-shell/tests/cases/builtins/command.yaml
+++ b/brush-shell/tests/cases/builtins/command.yaml
@@ -21,8 +21,8 @@ cases:
   - name: "command -v"
     stdin: |
       command -v echo
-      command -v ls
-      command -v $(which ls)
+      command -v cat
+      command -v $(command -v cat)
 
       command -v non-existent || echo "1. Not found"
       command -v /usr/bin/non-existent || echo "2. Not found"
diff --git a/brush-shell/tests/cases/builtins/dot.yaml b/brush-shell/tests/cases/builtins/dot.yaml
index 594b8554..31e28f5e 100644
--- a/brush-shell/tests/cases/builtins/dot.yaml
+++ b/brush-shell/tests/cases/builtins/dot.yaml
@@ -35,7 +35,7 @@ cases:
           }
     stdin: |
       var="orig"
-      source script.sh
+      source ./script.sh
       echo "var: ${var}"
       script_func
 
diff --git a/brush-shell/tests/cases/extended_tests.yaml b/brush-shell/tests/cases/extended_tests.yaml
index b100f686..a0afce24 100644
--- a/brush-shell/tests/cases/extended_tests.yaml
+++ b/brush-shell/tests/cases/extended_tests.yaml
@@ -184,9 +184,10 @@ cases:
     stdin: |
       regex="^$"
 
-      [[ "" =~ ''         ]] && echo "1. Matched"
+      # TODO: The commented out lines appear differ in behavior between versions of bash.
+      # [[ "" =~ ''         ]] && echo "1. Matched"
       [[ "" =~ '^$'       ]] && echo "2. Matched"
-      [[ "" =~ ""         ]] && echo "3. Matched"
+      # [[ "" =~ ""         ]] && echo "3. Matched"
       [[ "" =~ "^$"       ]] && echo "4. Matched"
       [[ "" =~ ^$         ]] && echo "5. Matched"
       [[ "" =~ ${regex}   ]] && echo "6. Matched"
diff --git a/brush-shell/tests/cases/word_expansion.yaml b/brush-shell/tests/cases/word_expansion.yaml
index bd53ffda..f38040ac 100644
--- a/brush-shell/tests/cases/word_expansion.yaml
+++ b/brush-shell/tests/cases/word_expansion.yaml
@@ -693,7 +693,7 @@ cases:
       echo "\${arr2@Q}: ${arr2@Q}"
 
   - name: "Parameter quote transformations - K"
-    known_failure: true
+    skip: true # TODO: Figure out why this succeeds on macOS but fails on Linux
     stdin: |
       var='""'
       echo "\${var@K}: ${var@K}"
@@ -720,7 +720,7 @@ cases:
       echo "\${arr2[*]@K}: ${arr2[*]@K}"
 
   - name: "Parameter quote transformations - k"
-    known_failure: true
+    skip: true # TODO: Figure out why this succeeds on macOS but fails on Linux
     stdin: |
       var='""'
       echo "\${var@k}: ${var@k}"