diff --git a/tests/modules/programs/oh-my-posh/assertion-all-three.nix b/tests/modules/programs/oh-my-posh/assertion-all-three.nix
new file mode 100644
index 000000000..5dcb22f1b
--- /dev/null
+++ b/tests/modules/programs/oh-my-posh/assertion-all-three.nix
@@ -0,0 +1,14 @@
+{
+  programs.oh-my-posh = {
+    enable = true;
+    settings = {
+      version = 2;
+    };
+    useTheme = "jandedobbeleer";
+    configFile = "/etc/oh-my-posh/custom.json";
+  };
+
+  test.asserts.assertions.expected = [
+    "oh-my-posh: Only one of 'settings', 'useTheme', or 'configFile' can be configured at a time."
+  ];
+}
diff --git a/tests/modules/programs/oh-my-posh/assertion-settings-config-file.nix b/tests/modules/programs/oh-my-posh/assertion-settings-config-file.nix
new file mode 100644
index 000000000..a988281df
--- /dev/null
+++ b/tests/modules/programs/oh-my-posh/assertion-settings-config-file.nix
@@ -0,0 +1,13 @@
+{
+  programs.oh-my-posh = {
+    enable = true;
+    settings = {
+      version = 2;
+    };
+    configFile = "/etc/oh-my-posh/custom.json";
+  };
+
+  test.asserts.assertions.expected = [
+    "oh-my-posh: Only one of 'settings', 'useTheme', or 'configFile' can be configured at a time."
+  ];
+}
diff --git a/tests/modules/programs/oh-my-posh/assertion-settings-theme.nix b/tests/modules/programs/oh-my-posh/assertion-settings-theme.nix
new file mode 100644
index 000000000..77152c909
--- /dev/null
+++ b/tests/modules/programs/oh-my-posh/assertion-settings-theme.nix
@@ -0,0 +1,13 @@
+{
+  programs.oh-my-posh = {
+    enable = true;
+    settings = {
+      version = 2;
+    };
+    useTheme = "jandedobbeleer";
+  };
+
+  test.asserts.assertions.expected = [
+    "oh-my-posh: Only one of 'settings', 'useTheme', or 'configFile' can be configured at a time."
+  ];
+}
diff --git a/tests/modules/programs/oh-my-posh/assertion-theme-config-file.nix b/tests/modules/programs/oh-my-posh/assertion-theme-config-file.nix
new file mode 100644
index 000000000..6baec21ac
--- /dev/null
+++ b/tests/modules/programs/oh-my-posh/assertion-theme-config-file.nix
@@ -0,0 +1,11 @@
+{
+  programs.oh-my-posh = {
+    enable = true;
+    useTheme = "jandedobbeleer";
+    configFile = "/etc/oh-my-posh/custom.json";
+  };
+
+  test.asserts.assertions.expected = [
+    "oh-my-posh: Only one of 'settings', 'useTheme', or 'configFile' can be configured at a time."
+  ];
+}
diff --git a/tests/modules/programs/oh-my-posh/config-file.nix b/tests/modules/programs/oh-my-posh/config-file.nix
new file mode 100644
index 000000000..8e7c28fa1
--- /dev/null
+++ b/tests/modules/programs/oh-my-posh/config-file.nix
@@ -0,0 +1,17 @@
+{
+  programs = {
+    bash.enable = true;
+
+    oh-my-posh = {
+      enable = true;
+      configFile = "/etc/oh-my-posh/custom.json";
+    };
+  };
+
+  nmt.script = ''
+    assertFileExists home-files/.bashrc
+    assertFileContains \
+      home-files/.bashrc \
+      '/bin/oh-my-posh init bash --config /etc/oh-my-posh/custom.json'
+  '';
+}
diff --git a/tests/modules/programs/oh-my-posh/default.nix b/tests/modules/programs/oh-my-posh/default.nix
index 4b4c9f46f..eaac1e52d 100644
--- a/tests/modules/programs/oh-my-posh/default.nix
+++ b/tests/modules/programs/oh-my-posh/default.nix
@@ -3,4 +3,10 @@
   oh-my-posh-zsh = ./zsh.nix;
   oh-my-posh-fish = ./fish.nix;
   oh-my-posh-nushell = ./nushell.nix;
+  oh-my-posh-settings = ./settings.nix;
+  oh-my-posh-config-file = ./config-file.nix;
+  oh-my-posh-assertion-settings-theme = ./assertion-settings-theme.nix;
+  oh-my-posh-assertion-settings-config-file = ./assertion-settings-config-file.nix;
+  oh-my-posh-assertion-theme-config-file = ./assertion-theme-config-file.nix;
+  oh-my-posh-assertion-all-three = ./assertion-all-three.nix;
 }
diff --git a/tests/modules/programs/oh-my-posh/settings.nix b/tests/modules/programs/oh-my-posh/settings.nix
new file mode 100644
index 000000000..51ac2b555
--- /dev/null
+++ b/tests/modules/programs/oh-my-posh/settings.nix
@@ -0,0 +1,39 @@
+{
+  programs = {
+    bash.enable = true;
+
+    oh-my-posh = {
+      enable = true;
+      settings = {
+        version = 2;
+        final_space = true;
+        blocks = [
+          {
+            type = "prompt";
+            alignment = "left";
+            segments = [
+              {
+                type = "shell";
+                style = "plain";
+                template = "{{ .Name }} ";
+              }
+            ];
+          }
+        ];
+      };
+    };
+  };
+
+  nmt.script = ''
+    assertFileExists home-files/.config/oh-my-posh/config.json
+    assertFileContains \
+      home-files/.config/oh-my-posh/config.json \
+      '"version": 2'
+    assertFileContains \
+      home-files/.config/oh-my-posh/config.json \
+      '"final_space": true'
+    assertFileContains \
+      home-files/.bashrc \
+      '/bin/oh-my-posh init bash --config /home/hm-user/.config/oh-my-posh/config.json'
+  '';
+}